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NCERT Exemplar Class 11 Biology Solutions Chapter 8 Cell The Unit Of Life

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NCERT Exemplar Class 11 Biology Solutions Chapter 8 Cell The Unit Of Life

Edited By Priyanka kumari | Updated on Aug 22, 2022 11:33 AM IST

NCERT exemplar Class 11 Biology solutions chapter 8 - Every organism that we know or see around us are all made up of cells; some are unicellular while others are multicellular. The term cell was coined by the English Scientist Robert Hooke. The ones with the single-cell are called unicellular organisms, and those with more than one are called multicellular organisms. NCERT Exemplar Class 11 Biology solutions chapter 8 contains related diagrams to show that cells exist in different shape, size and colour. As you’ll read the NCERT exemplar Class 11 Biology solutions chapter 8 further, you’ll come across the structure and functions of the different cell organelles that make up our cells and help in their proper functioning. The cell organelles differ from prokaryotic to eukaryotic cells.
Also, check NCERT Class 11 Biology Solutions

Multiple Choice Questions:

Question:1

A common characteristic feature of plant sieve tube cells and most of mammalian erythrocytes
a) Absence of mitochondria
b) Presence of cell wall
c) Presence of haemoglobin
d) Absence of nucleus

Answer:

Ans. The answer is the option (d) Absence of nucleus
Explanation: Sieve tubes are one of the components of phloem, and they do not contain a nucleus. In a similar manner, erythrocytes in mammalian cells also do not contain a nucleus.

Question:2

Select one which is not true for ribosome
a) Made of two subunits
b) Form polysome
c) May attach to mRNA
d) Have no role in protein synthesis

Answer:

Ans. The answer is the option (d) Have no role in protein synthesis

Explanation: Ribosome are known to be the protein factory, and they have an especially important role in the photosynthesis of plants. Other statements are correct.

Question:3

Which one of these is not a eukaryote?
a) Euglena
b) Anabaena
c) Spirogyra
d) Agaricus

Answer:

Ans. The answer is the option (b) Anabaena
Explanation: Anabaena belongs to the Monera kingdom, which has a unicellular prokaryotic arrangement. Others show eukaryotic features.

Question:4

Which of the following stains is not used for staining chromosomes?
a) Basic Fuchsin
b) Safranin
c) Methylene blue
d) Carmine

Answer:

Ans. The answer is the option (b) Safranin
Explanation: Safranin is used as a counterstain for endospore staining and gram staining. It can also be used for staining cartilage and mast cell granule. Other stains are used for staining chromosomes and nuclei.

Question:5

Different cells have different sizes. Arrange the following cells in ascending order of their size. Choose the correct option among the followings: -
a) Mycoplasma
b) Ostrich eggs
c) Human RBC
d) Bacteria
Options:
(a) (i), (iv), (iii) & (ii)
(b) (i), (iii), (iv) & (ii)
(c) (ii), (i), (iii) & (iv)
(d) (iii), (ii), (i) & (iv)

Answer:

Ans. The answer is the option (a) (i), (iv), (iii) & (ii)
Explanation: In ascending order, Mycoplasma is 0.3 micron in length and therefore the smallest. Ostrich egg is the largest living cell and is huge in size. Bacteria are 3-5 micron in length while RBCs are 7 microns in length.

Question:6

Which of the following features is common to prokaryotes and many eukaryotes?
a) Chromatin material present
b) Cell wall present
c) Nuclear membrane present
d) Membrane-bound sub-cellular organelles present

Answer:

Ans. The answer is the option (a) Chromatin material present
Explanation: Option (c) and option (d) are absent in prokaryotes and option (b) is absent in eukaryotes.
So, option (a), chromatin material is common to both prokaryotes and eukaryotes.

Question:7

Who proposed the fluid mosaic model of the plasma membrane?
a) Camillo Golgi
b) Schleiden and Schwann
c) Singer and Nicolson
d) Robert Brown

Answer:

The answer is the option (c), Singer and Nicolson
Explanation: The Golgi Complex was discovered by Camillo Golgi, cell theory was proposed by Schleiden and Schwann, and Robert Brown was the first who attempted to describe the nucleus.

Question:8

Which of the following statements is true for a secretory cell?
a) Golgi apparatus is absent
b) Rough Endoplasmic Reticulum (RER) is easily observed in the cell
c) Only Smooth Endoplasmic Reticulum (SER) is present
d) Secretory granules are formed in the nucleus.

Answer:

The answer is the option (b) Rough Endoplasmic Reticulum (RER) is easily observed in the cell
Explanation: RER is easily observed in the cells that are involved in secretion and protein synthesis. Other options are incorrect as Golgi apparatus is not present in a secretory cell,SER is present with RER in a secretory cell, and no secretory granules are formed in the nucleus

Question:9

What is a tonoplast?
a) Outer membrane of mitochondria
b) Inner membrane of chloroplast
c) Membrane boundary of the vacuole of plant cells
d) Cell membrane of a plant cell

Answer:

The answer is the option (c) Membrane boundary of the vacuole of plant cells
Explanation: In a plant cell, the vacuole is bound by a single membrane boundary called tonoplast.

Question:10

Which of the following is not true of a eukaryotic cell?
a) Cell wall is made up of peptidoglycans
b) It has 80S type of ribosome present in the cytoplasm
c) Mitochondria contain circular DNA
d) Membrane bound organelles are present

Answer:

The answer is the option (a) Cell wall is made up of peptidoglycans
Explanation: Cellulose makes the cell walls in a eukaryotic cell.

Question:11

Which of the following statements is not true for plasma membrane?
a) It is present in both plant and animal cell
b) Lipid is present as a bilayer in it
c) Proteins are present integrated as well as loosely associated with the lipid bilayer
d) Carbohydrate is never found in it

Answer:

Ans. The answer is the option (d) Carbohydrate is never found in it
Explanation: On carrying out a biochemical investigation on the plasma membrane, it was found that the two biochemical components that is found in the membrane are protein and carbohydrates. Other statements are true.

Question:12

Plastid differs from mitochondria on the basis of one of the following features. Mark the right answer.
a) Presence of two layers of membrane
b) Presence of ribosome
c) Presence of thylakoids
d) Presence of DNA

Answer:

Ans. The answer is the option (c) Presence of thylakoids
Explanation: Thylakoids are the structural elements of chloroplast found in the plastids and not in mitochondria. Other options are common to both plastids and mitochondria.

Question:13

Which of the following is not a function of cytoskeleton in a cell?
a) Intracellular transport
b) Maintenance of cell shape and structure
c) Support of the organelle
d) Cell motility

Answer:

The answer is the option (a) Intracellular transport
Explanation: Cytoskeleton consists of microtubules and microfilaments that are responsible for intercellular movement and not intracellular.

Question:14

The stain used to visualize mitochondria is
a) Fast green
b) Safranin
c) Aceto carmine
d) Janus green

Answer:

The answer is the option (d) Janus green
Explanation: Janus green is a basic vital stain that is used to demonstrate mitochondria as the oxidation-reduction sites in the cell. When the stain reacts with oxygen, it changes its colour to blue.

Very Short Answer Type Questions:

Question:1

What is the significance of vacuole in a plant cell?

Answer:
Vacuole helps in maintaining the balance of cell fluids and the shape of the cell by maintaining its turgidity.

Question:2

What does ‘S’ refer in the 70S & an 80S ribosome?

Answer:

The letter ‘S’ in ribosomes refers to Svedberg’s unit, which is used to measure the sedimentation coefficient. In cells, the higher the sediment coefficient, heavier is the structure.

Question:3

Mention a single membrane bound organelle which is rich in hydrolytic enzymes.

Answer:

Lysosomes are rich in hydrolytic enzymes like hydrolase, proteases, carbohydrase, and lipases.

Question:4

What are gas vacuoles? State their functions?

Answer:

Ans. Gas vacuoles are air vacuoles that are freely permeable to gas. They are present only in prokaryotes. It stores metabolic gases and also helps prokaryotic organisms in regulating buoyancy.

Question:5

What is the function of a polysome?

Answer:

Ans. Polysome is made up of a cluster of ribosomes that are held together by a strand of messenger RNA (mRNA) in rosette or helical group. They facilitate the translation of genetic code and play a vital role in the formation of multiple copies of the same polypeptide.

Question:6

What is the feature of a metacentric chromosome?

Answer:

Ans. In the metacentric chromosome, the centromere lies in the middle of the chromosome, forming two equal arms of a chromosome.

Question:7

What is referred to as satellite chromosome?

Answer:

Chromosomes with secondary constrictions at certain Locations formed by chromatin thread are called satellite chromosomes.

Short Answer Type Questions:

Question:1

Discuss briefly the role of nucleolus in the cells actively involved in protein synthesis.

Answer:

Nucleolus consists of DNA, RNA, and proteins. It is also called the ribosome factory. It receives and stores ribosomal proteins that are produced in the cytoplasm. These ribosomal proteins are the sites for protein synthesis in a cell.

Question:2

Explain the association of carbohydrate to the plasma membrane and its significance.

Answer:

Sugar residues attach with proteins or lipids in the plasma membrane, which can give rise to structures in short chains. They may be involved in cell recognition giving rise to different blood antigens, i.e. AB and O due to difference in the arrangement of carbohydrates on the surface of RNA. Cell surface differences that are related to the characteristic surface because of carbohydrate component also play a vital role in the specificity of cell action with bacteria, drugs, viruses, and hormones.

Question:3

Comment on the cartwheel structure of centriole.

Answer:

Ans. Centrosome consists of two cylindrical structures called centrioles. Both centrioles lie perpendicular to each other in which each appears like a cartwheel.

The centrioles are made up of nine peripheral fibrils of tubulin protein that are evenly spaced. The peripheral fibrils come in triplets, and all the adjacent triplets are linked to each other. The central portion of the proximal region of the centriole contains proteins and is called the hub. The hub is connected to the peripheral triplets by the help of radial spokes that are also proteinaceous.

Question:4

Briefly describe the cell theory.

Answer:

The Cell Theory was first proposed by Schleiden and Schwann in 1838-39. In their theory, they stated that (1) all living beings are products that are formed by one or more cells.(2) cells are the structural and functional units of life. A third statement was added to this theory by the works of Nagelli and Virchow. The cell theory was thus expanded to three statements –

(1) All living beings are products that are formed by one or more cells.
(2) Cells are the structural and functional units of life.
(3) new cells come from pre-existing cells.
In the modern cell theory, other points were also added. Some of them are-
(4) The basic composition is the same in all the cells.
(5) Energy flows occur in the cell.

Only viruses are an exception this Cell Theory as they are not made up of cells but of DNA and RNA materials.

Question:5

Differentiate between Rough Endoplasmic Reticulum (RER) and Smooth

Answer:

RER

SER

(i) Ribosomes are attached to the surface of RER, giving them rough appearance.

(i) Ribosomes are not attached on the surface and hence are smooth.

(ii) It takes an active part in synthesizing proteins and enzymes.

(ii) It takes part in the synthesis of lipids, glycogen, and steroids.


Question:6

Give the biochemical composition of plasma membrane. How are lipid molecules arranged in the membrane?

Answer:

Chemical composition of the plasma membrane can be summed up like 20-79% lipids, 20-70% proteins, 1-5% carbohydrates and 20% water.

Lipids are one of the major components that form the plasma membrane. The lipid molecules contain polar hydrophilic (water-loving), and non-polar hydrophobic (water resisting) ends. Hydrophilic part forms the head of the molecule and the hydrophobic part forms two tails of the molecule.

The tails are found near the centre of the membrane.

Question:7

What are plasmids? Describe their role in bacteria?

Answer:

The bacterial cell consists of genomic DNA as well as a small circular DNA. This circular DNA is a plasmid which is used to transfer information from one cell to another. The plasmid is used to track bacterial transformation with foreign DNA. It develops unique phenotype characteristics in the bacteria like the resistance to antibiotics. It also enables the bacterial cell to metabolize nutrients. It also facilitates the conjugation of bacteria. In modern experiments, plasmids are used to develop cloning vectors.

Question:8

What are histones? What are their functions?

Answer:

Histones are a type of protein that is highly alkaline in nature due to the high content of basic amino acid- arginine and lysine. They are found in chromosomal material in the nucleus of the eukaryotic cell. Histones facilitate the formation of nucleosomes—a segment of DNA coils around these histones and thus making more space for DNA to fit in. A 1.8 m strand of a DNA gets wound up around histones to make a structure of 90 microns in size.

Long Answer Type Questions:

Question:1

What structural and functional attributes must a cell have to be called a living cell?

Answer:
Structural and functional attributes that a cell must have to be called a living cell are:

  • Plasma Membrane: A cell should have a plasma membrane because, without it, there will be no container to hold the contents of the cell, and cells will not have any independent existence.

Functional Attributes of Plasma Membrane: The plasma membrane should not be fully permeable or impermeable; rather, it should be selectively permeable to allow the exchange of important materials between the cell and its environment.

  • Protoplasm: Protoplasm is the living material in a cell which contains all other important organelles of a cell which is required for life to continue. If protoplasm dries up, the cell becomes dead just like the sclerenchyma cells.

  • Endoplasmic Reticulum: Endoplasmic reticulum is the main site of protein and lipid synthesis and secretion. Without the endoplasmic reticulum, cells will not get the required material for its development and will die.


Mitochondria are not mandatory organelles for all living cells like Red Blood Cells do not contain mitochondria; still they are living cells. In the same way, prokaryotes also do not have mitochondria still they are living cells.

The nucleus is also not a mandatory requirement for all living cells. Prokaryotic cells do not have a nucleus.

Question:2

Briefly give the contributions of the following scientists in formulating the cell theory.
a) Rudolf Virchow
b) Schleiden and Schwann

Answer:
The Cell Theory was first proposed by Schleiden and Schwann in 1838-39. In their theory, they stated that
(1) All living beings are products that are formed by one or more cells.
(2) Cells are the structural and functional units of life.
A third statement was added to this theory by the works of Rudolf Virchow. The cell theory was thus expanded to three statements –

(1) All living beings are products that are formed by one or more cells.
(2) Cells are the structural and functional units of life.
(3) New cells come from pre-existing cells. The last statement was the contribution of Virchow who through his experimentation, proved that cells arise from the pre-existing cell and not through crystallization as was proposed by Schleiden and Schwann earlier.

All the three scientists helped in paving the way to formulate the modern cell theory. Main points of the modern version of cell theory are-
(1) All living beings are made from one or more cells.
(2) Cells are formed from the pre-existing cell.
(3) Cell is the functional and structural unit of life.
(4) Energy flows within cells.
(5) All cells have the same basic composition.

Question:3

Is extra genomic DNA present in prokaryotes and eukaryotes? If yes, indicate their location in both the types of organisms.

Answer:

Yes, extra genomic DNA is present in prokaryotes as well as in eukaryotes.
Extra Genomic DNA in Prokaryotes: In prokaryotes, circular DNA is the plasmid which is used to transfer information from one cell to another. The plasmid is used to track bacterial transformation with foreign DNA. It develops unique phenotype characteristics in the bacteria like the resistance to antibiotics. It also enables the bacterial cell to metabolize nutrients. It also facilitates the conjugation of bacteria. In modern experiments, plasmids are used to develop cloning vectors.

Extra Genomic DNA in Eukaryotes: Extra genomic DNA is present in mitochondria and plastids of eukaryotes. Mitochondrial DNA makes up almost 20000-25000 genes of the total genes in the human body. It has instructions for enzymes secretion and action. Plastids are found in plants that help in its growth by trapping radiation and storing food and other important nutrients for the plant. The DNA in the plastids facilitate the synthesis of protein.Since DNA is present in mitochondria and plastids, they have self-replication abilities and hence, they are semi-autonomous organelles.

Question:4

Structure and function are co-relatable in living organisms. Can you justify this by taking the plasma membrane as an example?

Answer:

The statement is true.
A cell should have a plasma membrane because without it, there will be no container to hold the contents of the cell, and cells will not have any independent existence.The plasma membrane should not be fully permeable or impermeable; rather, it should be selectively permeable to allow the exchange of important materials between the cell and its environment. The lipid bilayer that makes the plasma membrane contains protein molecules which act as a channel for transportation of substances in the cell or out of the cell. The fluid layer of lipid allows sure that only those molecules are passed through the plasma membrane that can travel easily through osmosis.

Question:5

Eukaryotic cells have organelles which may
a) Not be bound by a membrane
b) Bound by a single membrane
c) Bound by a double membrane
d) Group the various subcellular organelles into these three categories.

Answer:
(a) Ribosome is the organelles which are not bound by a membrane. They occur freely in the cytoplasm. These can also be found attached to the surface of endoplasmic reticulum, giving it a rough appearance.Ribosomes are also found in the matrix of mitochondria and stroma of plastids.

(b) Lysosomes are the cell organelles that are bound by a single membrane. Lysosomes arethe tiny sac-like structure that is found in animal cells but not in prokaryotes. Lysosomes help in destroying and preventing harmful substances and foreign materials from entering the cells. Most of the organelles of the cells are bound by double membranes.

(c) Mitochondria, plastids, nucleus, endoplasmic reticulum are some examples of double-membrane cell organelles. These organelles serve important functions in the cell-like synthesis of proteins, storing materials, providing energy to the cells.

Question:6

The genomic content of the nucleus is constant for a given species whereas the extrachromosomal DNA is found to be variable among the members of a population. Explain.

Answer:

The genomic content of the nucleus is constant for a given species which imparts specific characters to the species. Each species has its own unique set of characters which is entirely different from any other species. DNA is the carrier of traits and genetic information from one generation to another. The chromosomes that carry the DNA are fixed for particular organisms. A human cell contains 23 pairs of chromosomes. Had this unique set of chromosomes not existed, humans would not have got their special characteristics which make them human or cats would not look like cats or dogs would not give birth to puppies.

In case of extra genomic DNA, the number can vary because these are not responsible for the transfer of genetic traits from one generation to another, but these are only responsible for replication of a cell organelle in which they are present like the DNA present in the mitochondria and plastids.

Therefore, the genomic content of the nucleus is always constant for a given species, but the extra genomic content can vary among the members of the same species.

Question:7

Justify the statement, "Mitochondria are powerhouses of the cell.?

Answer:

Ans.

Mitochondria are cylindrical structures that are bound in double membranes- an outer membrane and an inner membrane. The outer membrane forms fold like structures called cristae. The cristae are related to the increase in surface area. Mitochondria serves as the main site for aerobic respiration.

They produce cellular energy in the form of Adenosine Triphosphate (ATP). The respiration occurs in two steps- glycolysis and Kreb’s Cycle. Glycolysis occurs in the cytoplasm, whereas Kreb’s cycle occurs in the mitochondria. Energy is not only produced, but it is also stored in the mitochondria for carrying out vital cell functions. Hence, mitochondria are also called the powerhouses of the cell.

Question:8

Is there a species-specific or region-specific type of plastids? How does one distinguish one from the other?

Answer:

Plastids are species-specific and not region-specific and are found in all plants and euglenoids. Different type of plastid consists of different pigment; thus, imparting different colours at the parts where they are found. On the basis of the colour they impart, plastids can be divided into three types:

Leucoplasts: These are colourless plastids that impart no colour to the parts of the plantwhere they are located. A plant with only leucoplasts is pale white in appearance. The primary function of this plastid is to store foods for the plant. There are three types of leucoplasts- Amyloplaststs, elaioplasts, and aleuroplast. Amyloplast helps in storing starch;elaioplast helps in storing fats, and aleuroplast helps in storing proteins.

Chromoplasts: These are not colourless but essentially non-green plastids. They impart colours other than green to plants. Various colours other than green found in petals and fruits are because of chromoplasts.

Chloroplasts: Chloroplasts consist of a green pigment called chlorophyll which imparts the green colour to the plant and also helps in trapping sunlight which is an essential function for photosynthesis.

Question:9

Write the functions of the following
a) Centromere
b) Cell wall
c) Smooth ER
d) Golgi Apparatus
e) Centrioles

Answer:
(a) It is important for facilitating proper chromosome segregation.

(b) The cell wall gives structure to the cell and protects it from injuries. It also helps with lining all the contents of the cell together.

(c) Smooth ER helps in the synthesizing of protein, lipids and carbohydrates. It also helps in drug detoxification and regulating calcium concentration.

(d) It is a primary site for the formation of glycolipids and glycoprotein. It also plays a vital role during cell division by formation of cell plates.

(e) Centrioles help in the cell division of animals by forming asters. It also forms the microtubules and sperm tail.

Question:10

Are the different types of plastids interchangeable? If yes, give examples where they are getting converted from one type to another.

Answer:

Yes, different types of plastids are interchangeable under different stages of development of the plant or due to some external cause involved.
There are three types of plastids: chromoplasts, chloroplasts and leucoplasts. Chloroplasts are plastids that contain a green pigment called chlorophyll and carotenoid pigments. In some situations, generally in mature leaves, the carotenoid increases in proportion to the chlorophyll.
The green colour decreases due to the loss of chlorophyll. This loss converts the chloroplast to chromoplast giving the leaves dark brown and reddish appearance. Similarly, flowers and fruits get their colour due to the conversion of chloroplast into chromoplast.

More About NCERT Exemplar Class 11 Biology Solutions Chapter 8

To provide the students with complete knowledge of the cell, the diagrams of the cell organelles are also provided in the Class 11 Biology NCERT Exemplar solutions chapter 8. The following set of solutions is made by members who possess immense knowledge in this particular field. NCERT exemplar Class 11 Biology solutions chapter 8 pdf download will help students during their preparation for the board exams and other competitive exams if they decide to appear for them.

NCERT Exemplar Class 11 Biology Solutions Chapter 8 - Major Subtopics

  • What is a cell?
  • Cell theory
  • An overview of cell
  • Prokaryotic cells
  • Cell envelope and its modifications
  • Ribosomes and inclusion bodies
  • Eukaryotic cells
  • Cell Membrane
  • Cell Wall
  • Endomembrane System
  • Endoplasmic Reticulum
  • Golgi apparatus
  • Lysosomes
  • Vacuoles
  • Mitochondria
  • Plastids
  • Ribosomes
  • Cytoskeleton
  • Cilia and Flagella
  • Centrosome and Centrioles
  • Nucleus
  • Microbodies
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NCERT Exemplar Class 11 Biology Solutions Chapter-Wise

NCERT Exemplar Class 11 Biology Solutions Chapter 8 - Important Topics

· Class 11 Biology NCERT Exemplar solutions chapter 8 has detailed that Cell and what exactly it is, cell theory, an overview of cells, Prokaryotic cells, Eukaryotic cells, what they are composed of, the difference between plant cell and an animal cell, all of the components of a cell are important topics which students should pay extra attention to.

· NCERT Exemplar Class 11 Biology solutions chapter 8 is considered important to study and understand as the next chapters are based on this chapter. Class 11 Biology NCERT Exemplar solution chapter 8 gives an explanation of cell and the theory around them which was given by Schleiden and Schwann, which was later modified by Rudolf Virchow.

NCERT Exemplar Class 11 Solutions for Other Subjects

Check Chapter-Wise Solutions of Questions Given in Book:

Also, Read NCERT Solution subject wise

Must Read NCERT Notes subject wise

Also Check NCERT Books and NCERT Syllabus here

Frequently Asked Question (FAQs)

1. How important is this NCERT Exemplar Class 11 Biology Solutions Chapter 8?

This chapter is the very base of studying complex biology for both medical science and other biological science streams. 

2. What all topics are included in this chapter?

In this chapter, cells are defined and described in detail, including eukaryotic and prokaryotic cells and cell organelles.  

3. Are these solutions helpful for NEET?

 Yes, using these NCERT exemplar Class 11 Biology solutions chapter 8, one can revise the entire chapter given in NCERT before exams. 

4. Are these solutions available offline?

One can download the Class 11 Biology NCERT Exemplar solutions chapter 8 using the download function.

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Get answers from students and experts

A block of mass 0.50 kg is moving with a speed of 2.00 ms-1 on a smooth surface. It strikes another mass of 1.00 kg and then they move together as a single body. The energy loss during the collision is

Option 1)

0.34\; J

Option 2)

0.16\; J

Option 3)

1.00\; J

Option 4)

0.67\; J

A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1 m 1000 times.  Assume that the potential energy lost each time he lowers the mass is dissipated.  How much fat will he use up considering the work done only when the weight is lifted up ?  Fat supplies 3.8×107 J of energy per kg which is converted to mechanical energy with a 20% efficiency rate.  Take g = 9.8 ms−2 :

Option 1)

2.45×10−3 kg

Option 2)

 6.45×10−3 kg

Option 3)

 9.89×10−3 kg

Option 4)

12.89×10−3 kg

 

An athlete in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can be estimated to be in the range

Option 1)

2,000 \; J - 5,000\; J

Option 2)

200 \, \, J - 500 \, \, J

Option 3)

2\times 10^{5}J-3\times 10^{5}J

Option 4)

20,000 \, \, J - 50,000 \, \, J

A particle is projected at 600   to the horizontal with a kinetic energy K. The kinetic energy at the highest point

Option 1)

K/2\,

Option 2)

\; K\;

Option 3)

zero\;

Option 4)

K/4

In the reaction,

2Al_{(s)}+6HCL_{(aq)}\rightarrow 2Al^{3+}\, _{(aq)}+6Cl^{-}\, _{(aq)}+3H_{2(g)}

Option 1)

11.2\, L\, H_{2(g)}  at STP  is produced for every mole HCL_{(aq)}  consumed

Option 2)

6L\, HCl_{(aq)}  is consumed for ever 3L\, H_{2(g)}      produced

Option 3)

33.6 L\, H_{2(g)} is produced regardless of temperature and pressure for every mole Al that reacts

Option 4)

67.2\, L\, H_{2(g)} at STP is produced for every mole Al that reacts .

How many moles of magnesium phosphate, Mg_{3}(PO_{4})_{2} will contain 0.25 mole of oxygen atoms?

Option 1)

0.02

Option 2)

3.125 × 10-2

Option 3)

1.25 × 10-2

Option 4)

2.5 × 10-2

If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will

Option 1)

decrease twice

Option 2)

increase two fold

Option 3)

remain unchanged

Option 4)

be a function of the molecular mass of the substance.

With increase of temperature, which of these changes?

Option 1)

Molality

Option 2)

Weight fraction of solute

Option 3)

Fraction of solute present in water

Option 4)

Mole fraction.

Number of atoms in 558.5 gram Fe (at. wt.of Fe = 55.85 g mol-1) is

Option 1)

twice that in 60 g carbon

Option 2)

6.023 × 1022

Option 3)

half that in 8 g He

Option 4)

558.5 × 6.023 × 1023

A pulley of radius 2 m is rotated about its axis by a force F = (20t - 5t2) newton (where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is 10 kg m2 , the number of rotations made by the pulley before its direction of motion if reversed, is

Option 1)

less than 3

Option 2)

more than 3 but less than 6

Option 3)

more than 6 but less than 9

Option 4)

more than 9

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3 Jobs Available
GIS Expert

GIS officer work on various GIS software to conduct a study and gather spatial and non-spatial information. GIS experts update the GIS data and maintain it. The databases include aerial or satellite imagery, latitudinal and longitudinal coordinates, and manually digitized images of maps. In a career as GIS expert, one is responsible for creating online and mobile maps.

3 Jobs Available
Data Analyst

The invention of the database has given fresh breath to the people involved in the data analytics career path. Analysis refers to splitting up a whole into its individual components for individual analysis. Data analysis is a method through which raw data are processed and transformed into information that would be beneficial for user strategic thinking.

Data are collected and examined to respond to questions, evaluate hypotheses or contradict theories. It is a tool for analyzing, transforming, modeling, and arranging data with useful knowledge, to assist in decision-making and methods, encompassing various strategies, and is used in different fields of business, research, and social science.

3 Jobs Available
Geothermal Engineer

Individuals who opt for a career as geothermal engineers are the professionals involved in the processing of geothermal energy. The responsibilities of geothermal engineers may vary depending on the workplace location. Those who work in fields design facilities to process and distribute geothermal energy. They oversee the functioning of machinery used in the field.

3 Jobs Available
Database Architect

If you are intrigued by the programming world and are interested in developing communications networks then a career as database architect may be a good option for you. Data architect roles and responsibilities include building design models for data communication networks. Wide Area Networks (WANs), local area networks (LANs), and intranets are included in the database networks. It is expected that database architects will have in-depth knowledge of a company's business to develop a network to fulfil the requirements of the organisation. Stay tuned as we look at the larger picture and give you more information on what is db architecture, why you should pursue database architecture, what to expect from such a degree and what your job opportunities will be after graduation. Here, we will be discussing how to become a data architect. Students can visit NIT Trichy, IIT Kharagpur, JMI New Delhi

3 Jobs Available
Remote Sensing Technician

Individuals who opt for a career as a remote sensing technician possess unique personalities. Remote sensing analysts seem to be rational human beings, they are strong, independent, persistent, sincere, realistic and resourceful. Some of them are analytical as well, which means they are intelligent, introspective and inquisitive. 

Remote sensing scientists use remote sensing technology to support scientists in fields such as community planning, flight planning or the management of natural resources. Analysing data collected from aircraft, satellites or ground-based platforms using statistical analysis software, image analysis software or Geographic Information Systems (GIS) is a significant part of their work. Do you want to learn how to become remote sensing technician? There's no need to be concerned; we've devised a simple remote sensing technician career path for you. Scroll through the pages and read.

3 Jobs Available
Budget Analyst

Budget analysis, in a nutshell, entails thoroughly analyzing the details of a financial budget. The budget analysis aims to better understand and manage revenue. Budget analysts assist in the achievement of financial targets, the preservation of profitability, and the pursuit of long-term growth for a business. Budget analysts generally have a bachelor's degree in accounting, finance, economics, or a closely related field. Knowledge of Financial Management is of prime importance in this career.

4 Jobs Available
Data Analyst

The invention of the database has given fresh breath to the people involved in the data analytics career path. Analysis refers to splitting up a whole into its individual components for individual analysis. Data analysis is a method through which raw data are processed and transformed into information that would be beneficial for user strategic thinking.

Data are collected and examined to respond to questions, evaluate hypotheses or contradict theories. It is a tool for analyzing, transforming, modeling, and arranging data with useful knowledge, to assist in decision-making and methods, encompassing various strategies, and is used in different fields of business, research, and social science.

3 Jobs Available
Underwriter

An underwriter is a person who assesses and evaluates the risk of insurance in his or her field like mortgage, loan, health policy, investment, and so on and so forth. The underwriter career path does involve risks as analysing the risks means finding out if there is a way for the insurance underwriter jobs to recover the money from its clients. If the risk turns out to be too much for the company then in the future it is an underwriter who will be held accountable for it. Therefore, one must carry out his or her job with a lot of attention and diligence.

3 Jobs Available
Finance Executive
3 Jobs Available
Product Manager

A Product Manager is a professional responsible for product planning and marketing. He or she manages the product throughout the Product Life Cycle, gathering and prioritising the product. A product manager job description includes defining the product vision and working closely with team members of other departments to deliver winning products.  

3 Jobs Available
Operations Manager

Individuals in the operations manager jobs are responsible for ensuring the efficiency of each department to acquire its optimal goal. They plan the use of resources and distribution of materials. The operations manager's job description includes managing budgets, negotiating contracts, and performing administrative tasks.

3 Jobs Available
Stock Analyst

Individuals who opt for a career as a stock analyst examine the company's investments makes decisions and keep track of financial securities. The nature of such investments will differ from one business to the next. Individuals in the stock analyst career use data mining to forecast a company's profits and revenues, advise clients on whether to buy or sell, participate in seminars, and discussing financial matters with executives and evaluate annual reports.

2 Jobs Available
Researcher

A Researcher is a professional who is responsible for collecting data and information by reviewing the literature and conducting experiments and surveys. He or she uses various methodological processes to provide accurate data and information that is utilised by academicians and other industry professionals. Here, we will discuss what is a researcher, the researcher's salary, types of researchers.

2 Jobs Available
Welding Engineer

Welding Engineer Job Description: A Welding Engineer work involves managing welding projects and supervising welding teams. He or she is responsible for reviewing welding procedures, processes and documentation. A career as Welding Engineer involves conducting failure analyses and causes on welding issues. 

5 Jobs Available
Transportation Planner

A career as Transportation Planner requires technical application of science and technology in engineering, particularly the concepts, equipment and technologies involved in the production of products and services. In fields like land use, infrastructure review, ecological standards and street design, he or she considers issues of health, environment and performance. A Transportation Planner assigns resources for implementing and designing programmes. He or she is responsible for assessing needs, preparing plans and forecasts and compliance with regulations.

3 Jobs Available
Environmental Engineer

Individuals who opt for a career as an environmental engineer are construction professionals who utilise the skills and knowledge of biology, soil science, chemistry and the concept of engineering to design and develop projects that serve as solutions to various environmental problems. 

2 Jobs Available
Safety Manager

A Safety Manager is a professional responsible for employee’s safety at work. He or she plans, implements and oversees the company’s employee safety. A Safety Manager ensures compliance and adherence to Occupational Health and Safety (OHS) guidelines.

2 Jobs Available
Conservation Architect

A Conservation Architect is a professional responsible for conserving and restoring buildings or monuments having a historic value. He or she applies techniques to document and stabilise the object’s state without any further damage. A Conservation Architect restores the monuments and heritage buildings to bring them back to their original state.

2 Jobs Available
Structural Engineer

A Structural Engineer designs buildings, bridges, and other related structures. He or she analyzes the structures and makes sure the structures are strong enough to be used by the people. A career as a Structural Engineer requires working in the construction process. It comes under the civil engineering discipline. A Structure Engineer creates structural models with the help of computer-aided design software. 

2 Jobs Available
Highway Engineer

Highway Engineer Job Description: A Highway Engineer is a civil engineer who specialises in planning and building thousands of miles of roads that support connectivity and allow transportation across the country. He or she ensures that traffic management schemes are effectively planned concerning economic sustainability and successful implementation.

2 Jobs Available
Field Surveyor

Are you searching for a Field Surveyor Job Description? A Field Surveyor is a professional responsible for conducting field surveys for various places or geographical conditions. He or she collects the required data and information as per the instructions given by senior officials. 

2 Jobs Available
Orthotist and Prosthetist

Orthotists and Prosthetists are professionals who provide aid to patients with disabilities. They fix them to artificial limbs (prosthetics) and help them to regain stability. There are times when people lose their limbs in an accident. In some other occasions, they are born without a limb or orthopaedic impairment. Orthotists and prosthetists play a crucial role in their lives with fixing them to assistive devices and provide mobility.

6 Jobs Available
Pathologist

A career in pathology in India is filled with several responsibilities as it is a medical branch and affects human lives. The demand for pathologists has been increasing over the past few years as people are getting more aware of different diseases. Not only that, but an increase in population and lifestyle changes have also contributed to the increase in a pathologist’s demand. The pathology careers provide an extremely huge number of opportunities and if you want to be a part of the medical field you can consider being a pathologist. If you want to know more about a career in pathology in India then continue reading this article.

5 Jobs Available
Veterinary Doctor
5 Jobs Available
Speech Therapist
4 Jobs Available
Gynaecologist

Gynaecology can be defined as the study of the female body. The job outlook for gynaecology is excellent since there is evergreen demand for one because of their responsibility of dealing with not only women’s health but also fertility and pregnancy issues. Although most women prefer to have a women obstetrician gynaecologist as their doctor, men also explore a career as a gynaecologist and there are ample amounts of male doctors in the field who are gynaecologists and aid women during delivery and childbirth. 

4 Jobs Available
Audiologist

The audiologist career involves audiology professionals who are responsible to treat hearing loss and proactively preventing the relevant damage. Individuals who opt for a career as an audiologist use various testing strategies with the aim to determine if someone has a normal sensitivity to sounds or not. After the identification of hearing loss, a hearing doctor is required to determine which sections of the hearing are affected, to what extent they are affected, and where the wound causing the hearing loss is found. As soon as the hearing loss is identified, the patients are provided with recommendations for interventions and rehabilitation such as hearing aids, cochlear implants, and appropriate medical referrals. While audiology is a branch of science that studies and researches hearing, balance, and related disorders.

3 Jobs Available
Oncologist

An oncologist is a specialised doctor responsible for providing medical care to patients diagnosed with cancer. He or she uses several therapies to control the cancer and its effect on the human body such as chemotherapy, immunotherapy, radiation therapy and biopsy. An oncologist designs a treatment plan based on a pathology report after diagnosing the type of cancer and where it is spreading inside the body.

3 Jobs Available
Anatomist

Are you searching for an ‘Anatomist job description’? An Anatomist is a research professional who applies the laws of biological science to determine the ability of bodies of various living organisms including animals and humans to regenerate the damaged or destroyed organs. If you want to know what does an anatomist do, then read the entire article, where we will answer all your questions.

2 Jobs Available
Actor

For an individual who opts for a career as an actor, the primary responsibility is to completely speak to the character he or she is playing and to persuade the crowd that the character is genuine by connecting with them and bringing them into the story. This applies to significant roles and littler parts, as all roles join to make an effective creation. Here in this article, we will discuss how to become an actor in India, actor exams, actor salary in India, and actor jobs. 

4 Jobs Available
Acrobat

Individuals who opt for a career as acrobats create and direct original routines for themselves, in addition to developing interpretations of existing routines. The work of circus acrobats can be seen in a variety of performance settings, including circus, reality shows, sports events like the Olympics, movies and commercials. Individuals who opt for a career as acrobats must be prepared to face rejections and intermittent periods of work. The creativity of acrobats may extend to other aspects of the performance. For example, acrobats in the circus may work with gym trainers, celebrities or collaborate with other professionals to enhance such performance elements as costume and or maybe at the teaching end of the career.

3 Jobs Available
Video Game Designer

Career as a video game designer is filled with excitement as well as responsibilities. A video game designer is someone who is involved in the process of creating a game from day one. He or she is responsible for fulfilling duties like designing the character of the game, the several levels involved, plot, art and similar other elements. Individuals who opt for a career as a video game designer may also write the codes for the game using different programming languages.

Depending on the video game designer job description and experience they may also have to lead a team and do the early testing of the game in order to suggest changes and find loopholes.

3 Jobs Available
Radio Jockey

Radio Jockey is an exciting, promising career and a great challenge for music lovers. If you are really interested in a career as radio jockey, then it is very important for an RJ to have an automatic, fun, and friendly personality. If you want to get a job done in this field, a strong command of the language and a good voice are always good things. Apart from this, in order to be a good radio jockey, you will also listen to good radio jockeys so that you can understand their style and later make your own by practicing.

A career as radio jockey has a lot to offer to deserving candidates. If you want to know more about a career as radio jockey, and how to become a radio jockey then continue reading the article.

3 Jobs Available
Choreographer

The word “choreography" actually comes from Greek words that mean “dance writing." Individuals who opt for a career as a choreographer create and direct original dances, in addition to developing interpretations of existing dances. A Choreographer dances and utilises his or her creativity in other aspects of dance performance. For example, he or she may work with the music director to select music or collaborate with other famous choreographers to enhance such performance elements as lighting, costume and set design.

2 Jobs Available
Social Media Manager

A career as social media manager involves implementing the company’s or brand’s marketing plan across all social media channels. Social media managers help in building or improving a brand’s or a company’s website traffic, build brand awareness, create and implement marketing and brand strategy. Social media managers are key to important social communication as well.

2 Jobs Available
Photographer

Photography is considered both a science and an art, an artistic means of expression in which the camera replaces the pen. In a career as a photographer, an individual is hired to capture the moments of public and private events, such as press conferences or weddings, or may also work inside a studio, where people go to get their picture clicked. Photography is divided into many streams each generating numerous career opportunities in photography. With the boom in advertising, media, and the fashion industry, photography has emerged as a lucrative and thrilling career option for many Indian youths.

2 Jobs Available
Producer

An individual who is pursuing a career as a producer is responsible for managing the business aspects of production. They are involved in each aspect of production from its inception to deception. Famous movie producers review the script, recommend changes and visualise the story. 

They are responsible for overseeing the finance involved in the project and distributing the film for broadcasting on various platforms. A career as a producer is quite fulfilling as well as exhaustive in terms of playing different roles in order for a production to be successful. Famous movie producers are responsible for hiring creative and technical personnel on contract basis.

2 Jobs Available
Copy Writer

In a career as a copywriter, one has to consult with the client and understand the brief well. A career as a copywriter has a lot to offer to deserving candidates. Several new mediums of advertising are opening therefore making it a lucrative career choice. Students can pursue various copywriter courses such as Journalism, Advertising, Marketing Management. Here, we have discussed how to become a freelance copywriter, copywriter career path, how to become a copywriter in India, and copywriting career outlook. 

5 Jobs Available
Vlogger

In a career as a vlogger, one generally works for himself or herself. However, once an individual has gained viewership there are several brands and companies that approach them for paid collaboration. It is one of those fields where an individual can earn well while following his or her passion. 

Ever since internet costs got reduced the viewership for these types of content has increased on a large scale. Therefore, a career as a vlogger has a lot to offer. If you want to know more about the Vlogger eligibility, roles and responsibilities then continue reading the article. 

3 Jobs Available
Publisher

For publishing books, newspapers, magazines and digital material, editorial and commercial strategies are set by publishers. Individuals in publishing career paths make choices about the markets their businesses will reach and the type of content that their audience will be served. Individuals in book publisher careers collaborate with editorial staff, designers, authors, and freelance contributors who develop and manage the creation of content.

3 Jobs Available
Journalist

Careers in journalism are filled with excitement as well as responsibilities. One cannot afford to miss out on the details. As it is the small details that provide insights into a story. Depending on those insights a journalist goes about writing a news article. A journalism career can be stressful at times but if you are someone who is passionate about it then it is the right choice for you. If you want to know more about the media field and journalist career then continue reading this article.

3 Jobs Available
Editor

Individuals in the editor career path is an unsung hero of the news industry who polishes the language of the news stories provided by stringers, reporters, copywriters and content writers and also news agencies. Individuals who opt for a career as an editor make it more persuasive, concise and clear for readers. In this article, we will discuss the details of the editor's career path such as how to become an editor in India, editor salary in India and editor skills and qualities.

3 Jobs Available
Reporter

Individuals who opt for a career as a reporter may often be at work on national holidays and festivities. He or she pitches various story ideas and covers news stories in risky situations. Students can pursue a BMC (Bachelor of Mass Communication), B.M.M. (Bachelor of Mass Media), or MAJMC (MA in Journalism and Mass Communication) to become a reporter. While we sit at home reporters travel to locations to collect information that carries a news value.  

2 Jobs Available
Corporate Executive

Are you searching for a Corporate Executive job description? A Corporate Executive role comes with administrative duties. He or she provides support to the leadership of the organisation. A Corporate Executive fulfils the business purpose and ensures its financial stability. In this article, we are going to discuss how to become corporate executive.

2 Jobs Available
Multimedia Specialist

A multimedia specialist is a media professional who creates, audio, videos, graphic image files, computer animations for multimedia applications. He or she is responsible for planning, producing, and maintaining websites and applications. 

2 Jobs Available
Welding Engineer

Welding Engineer Job Description: A Welding Engineer work involves managing welding projects and supervising welding teams. He or she is responsible for reviewing welding procedures, processes and documentation. A career as Welding Engineer involves conducting failure analyses and causes on welding issues. 

5 Jobs Available
QA Manager
4 Jobs Available
Quality Controller

A quality controller plays a crucial role in an organisation. He or she is responsible for performing quality checks on manufactured products. He or she identifies the defects in a product and rejects the product. 

A quality controller records detailed information about products with defects and sends it to the supervisor or plant manager to take necessary actions to improve the production process.

3 Jobs Available
Production Manager
3 Jobs Available
Product Manager

A Product Manager is a professional responsible for product planning and marketing. He or she manages the product throughout the Product Life Cycle, gathering and prioritising the product. A product manager job description includes defining the product vision and working closely with team members of other departments to deliver winning products.  

3 Jobs Available
QA Lead

A QA Lead is in charge of the QA Team. The role of QA Lead comes with the responsibility of assessing services and products in order to determine that he or she meets the quality standards. He or she develops, implements and manages test plans. 

2 Jobs Available
Structural Engineer

A Structural Engineer designs buildings, bridges, and other related structures. He or she analyzes the structures and makes sure the structures are strong enough to be used by the people. A career as a Structural Engineer requires working in the construction process. It comes under the civil engineering discipline. A Structure Engineer creates structural models with the help of computer-aided design software. 

2 Jobs Available
Process Development Engineer

The Process Development Engineers design, implement, manufacture, mine, and other production systems using technical knowledge and expertise in the industry. They use computer modeling software to test technologies and machinery. An individual who is opting career as Process Development Engineer is responsible for developing cost-effective and efficient processes. They also monitor the production process and ensure it functions smoothly and efficiently.

2 Jobs Available
QA Manager
4 Jobs Available
AWS Solution Architect

An AWS Solution Architect is someone who specializes in developing and implementing cloud computing systems. He or she has a good understanding of the various aspects of cloud computing and can confidently deploy and manage their systems. He or she troubleshoots the issues and evaluates the risk from the third party. 

4 Jobs Available
Azure Administrator

An Azure Administrator is a professional responsible for implementing, monitoring, and maintaining Azure Solutions. He or she manages cloud infrastructure service instances and various cloud servers as well as sets up public and private cloud systems. 

4 Jobs Available
Computer Programmer

Careers in computer programming primarily refer to the systematic act of writing code and moreover include wider computer science areas. The word 'programmer' or 'coder' has entered into practice with the growing number of newly self-taught tech enthusiasts. Computer programming careers involve the use of designs created by software developers and engineers and transforming them into commands that can be implemented by computers. These commands result in regular usage of social media sites, word-processing applications and browsers.

3 Jobs Available
Product Manager

A Product Manager is a professional responsible for product planning and marketing. He or she manages the product throughout the Product Life Cycle, gathering and prioritising the product. A product manager job description includes defining the product vision and working closely with team members of other departments to deliver winning products.  

3 Jobs Available
Information Security Manager

Individuals in the information security manager career path involves in overseeing and controlling all aspects of computer security. The IT security manager job description includes planning and carrying out security measures to protect the business data and information from corruption, theft, unauthorised access, and deliberate attack 

3 Jobs Available
ITSM Manager
3 Jobs Available
Automation Test Engineer

An Automation Test Engineer job involves executing automated test scripts. He or she identifies the project’s problems and troubleshoots them. The role involves documenting the defect using management tools. He or she works with the application team in order to resolve any issues arising during the testing process. 

2 Jobs Available
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