NCERT Solutions For Class 11 Biology Chapter 10 Cell Cycle and Cell Division

NCERT Solutions For Class 11 Biology Chapter 10 Cell Cycle and Cell Division

Edited By Irshad Anwar | Updated on Sep 06, 2023 10:26 PM IST

NCERT Solutions | Chapter 10: Cell Cycle and Cell Division

NCERT Solutions for Class 11 Biology Chapter 10 Cell cycle and Cell division: In accordance with the latest CBSE syllabus, this Cell Cycle and Cell Division NCERT PDF covers the crucial specifics of the cell division processes that occur in all living things in Biology Class 11. Are you aware of the fact, that all organisms, even the largest and smallest, start their lives in a single cell? You may wonder how, from a single cell, they form such large organisms. This information is precisely curated in Cell Cycle and Cell Division NCERT Solutions what students in Class 11 need. Solutions for NCERT Class 11 Biology Chapter 10 Cell Cycle and Cell Division contain solutions which comprise an excellent explanation of all the questions which are based on cell division and the different cycles of the cell. In Class 11 Biology Chapter 10 NCERT Solutions, you will learn that growth and reproduction are characteristics of cells, indeed of all living organisms. The NCERT Solutions for Class 11 were carefully crafted by a group of subject-matter experts at Careers360 who have in-depth knowledge of the subject.

By going through Cell Division Class 11 NCERT Solutions, you will be surprised by knowing that all the cells reproduce by dividing into two. Each parental cell give rise to two daughter cells each time they divide. These newly formed daughter cells can themselves grow and divide, giving rise to a new cell population that is formed by the growth and division of a single parental cell and its progeny. NCERT Solutions for Class 11 Biology Chapter 10 Cell Cycle and Cell Division will provide you with all the answers to those questions which are mentioned in Cell Cycle NCERT. If you are looking for an answer from any other chapter even from any other class then go with NCERT Solutions. Here you will get all Class 11 Biology Chapter 10 Question Answers of NCERT Textbook Cell Division Class 11 Exercise easily.

Cell Cycle and Cell Division NCERT PDF: Cell division is a very important process in all living organisms and during the division, DNA replication, as well as cell growth also takes place. All these processes mentioned in Cell Cycle and Cell Division NCERT Solutions Class 11, i.e., cell division, DNA replication, and cell growth, have to take place in a coordinated way to ensure the correct division and formation of progeny cells containing intact genomes. In the solutions of Cell Cycle and Cell Division Class 11th you will get all the answers related to this topic only. After going through the Solution of Cell Cycle NCERT, you must be able to understand the answer of the following questions which are given Cell Cycle and Cell division NCERT:

NCERT Solutions For Class 11 Biology Cell Cycle and Cell Division | Download PDF

Download PDF

Also Read,

NEET Highest Scoring Chapters & Topics
Most Scoring concepts For NEET (Based On Previous Year Analysis)
Download EBook

NCERT Solutions for Class 11 Biology Chapter 10 - Cell Cycle and Cell Division: Solved Exercise

The detailed Class 11 Biology Ch 10 NCERT Solutions are given below:

Chapter 10 Biology Class 11 NCERT Solutions

Q1. What is the average cell cycle span for a mammalian cell?

Answer:

The average cell cycle span for a mammalian cell is 24 hours.

Q2. Distinguish cytokinesis from karyokinesis.

Answer:

The differences between cytokinesis and karyokinesis are as follows:

Cytokinesis
Karyokinesis
The process of division of cytoplasm is called cytokinesis
The process of division of the nucleus is called karyokinesis
Cytokinesis takes place after the end of M-phase
Karyokinesis take place during the M-phase

Q3. Describe the events taking place during interphase.

Answer:

Interphase refers to the phase in the cell cycle which prepares the cell and its nucleus for the division. Interphase is divided into three sub-phases like G_{1}, S and G_{2}

1. G1 phase- It is the longest stage of interphase, also called the first growth phase or post-mitotic gap phase. Both the cell and its nucleus grow in size. There is the synthesis of RNA, proteins, nucleotides, amino acids for histones and energy-rich compounds. There is a checkpoint called G1 cyclin or CG1, where the decision about the entry in the G0 stage is taken. If the decision is made cell cycle goes on uninterrupted or the cell undergoes the G0 stage. It refers to the resting phase in which the cell is arrested and not allowed to divide.

2. S Phase- In this phase, chromosomes along with their DNA replicates. The content of DNA doubles up, however, the number of chromosomes remains the same. After replication, the daughter chromosomes remain attached in the region of the centromere. The centrosome, if present begins to divide.

3. G2 phase- This phase is characterised by increased synthesis of RNA and proteins. The cell organelles undergo multiplication in this phase while the cell grows in size. G2 phase is also called as second growth phase or pre-mitotic gap phase.

NCERT Solutions for Class 11 Biology Chapter 10 Cell Cycle and Cell Division:

Q4. What is Go (quiescent phase) of cell cycle?

Answer:

G o (quiescent phase)- It refers to the stage of inactivation of cell cycle due to the absence of mitogens and energy-rich compounds. The cells of this stage are metabolically active and they act as reserve cells i.e. they undergo growth and differentiation for a specific function. E.g Cells in the quiescent centre of the root tip.

Cell Division Class 11 Exercise

Q5. Why is mitosis called equational division?

Answer:

Mitosis is called equational division because, at the end of mitosis, the numbers of chromosomes remain same in parental cells and daughter cells. Similarly, the ploidy of the parental and daughter cells also remain the same in mitosis.

Q6. Name the stage of cell cycle at which one of the following events occur:

(i) Chromosomes are moved to spindle equator.

Answer:

(i) Chromosomes are moved to spindle equator

During metaphase, the chromosomes move to the spindle equator and align themselves there.

Q6. Name the stage of cell cycle at which one of the following events occur:

(ii) Centromere splits and chromatids separate.

Answer:

(ii) Centromere splits and chromatids separate

During anaphase, the centromere splits and chromatids are separated. These chromatids after separation move to the opposite poles.

Q6. Name the stage of cell cycle at which one of the following events occur:

(iii) Pairing between homologous chromosomes takes place.

Answer:

(iii) Pairing between homologous chromosomes takes place

The pairing between homologous chromosomes takes place during zygotene of prophase I of meiosis I. As a result of this pairing bivalents are formed.

Q6. Name the stage of cell cycle at which one of the following events occur:

(iv) Crossing over between homologous chromosomes takes place.

Answer:

(iv) Crossing over between homologous chromosomes takes place

Crossing over between homologous chromosomes takes place during pachytene of prophase I of meiosis I.

Class 11 Biology Chapter 10 Question Answers

Q7. Describe the following:

(a) synapsis

Draw a diagram to illustrate your answer.

Answer:

Synapsis- The process of the pairing of homologous chromosomes during the zygotene stage of prophase I of meiosis I is called synapsis. During synapse, a synaptonemal complex is formed by the homologous chromosome which is referred to as a bivalent or a tetrad.

Q7. Describe the following:

(b) bivalent

Draw a diagram to illustrate your answer.

Answer:

Bivalent- it refers to the structure formed by a pair of the synapsed homologous chromosome.

1650619685319

Q7. Describe the following:

(c) chiasmata

Draw a diagram to illustrate your answer.

Answer:

Chiasmata- These are points of attachment between homologous chromosomes during their separation in diplotene to metaphase I stage of meiosis. Chiasmata are initially formed in the regions of crossing over between nonsister chromatids but later on, tend to shift sideways.

1650619711326

Q8. How does cytokinesis in plant cells differ from that in animal cells?

Answer:

The process of cytokinesis differs in plant and animal cells

Cytokinesis in plants
Cytokinesis in animals
It occurs by cell plate method
It takes place by cleavage method
The spindle persists during cytokinesis
Spindle starts to degenerate after anaphase
Cell plate grows centrifugally
Cleavage takes place centripetally
The new cell membrane is derived from vesicles of Golgi apparatus
The new cell wall is derived from the endoplasmic reticulum

CBSE NCERT solutions for class 11 biology chapter 10 cell cycle and cell division:

Q9. Find examples where the four daughter cells from meiosis are equal in size and where they are found unequal in size.

Answer:

Meiosis is the reductional division that leads to the formation of four daughter cells which have half the number of chromosomes than the parent cell. Meiosis takes place during spermatogenesis and oogenesis in humans. During spermatogenesis, the daughter cells or sperms formed are equal in size while during oogenesis the daughter cells are unequal in size.

Cell Cycle and Cell Division Class 11 Questions and Answers

Q10. Distinguish anaphase of mitosis from anaphase I of meiosis.

Answer:

Anaphase of mitosis
Anaphase I of meiosis
Anaphase of mitosis involves splitting of each chromosome at centromere into two sister chromatids which start moving towards the opposite poles.
1650619738971
Anaphase I of meiosis I involve the separation of homologous chromosomes, while the chromatids remain attached at their chromatids.
1650619750525

















Q11. List the main differences between mitosis and meiosis.

Answer:

Mitosis
Meiosis
It takes place in somatic cells
It takes place in germ cells
The cells undergoing mitosis can be diploid or haploid
The cells that undergo meiosis cannot be haploid
It involves a single division producing two daughter cells at the end
It involves two divisions that give rise to four daughter cells
The daughter cells formed after mitosis are exactly similar to their parent cell
The daughter cells formed after meiosis are neither similar to the parent one nor to one another
The number of chromosome remains the same after meiosis
The number of chromosomes is reduced to half after meiosis.
Mitosis helps in multiplication of cells, healing and repair
Meiosis is involved in the formation of meiospores or gametes


Q12. What is the significance of meiosis?

Answer:

The process of meiosis is essential for all sexually reproducing organisms. It occurs in reproductive cells to form gametes that have half the number of chromosomes of the reproductive cells. The two gametes from reproductive cells fuse with each other to form a zygote. As a result, the zygote comes to have a double number of chromosomes. Thus, meiosis maintains the chromosome number of organisms. apart from this, there are other significances of meiosis also. Some of these are as follows

1. Meiosis form gametes that are required for sexual reproduction

2. Meiosis maintains the fixed number of chromosomes in sexually reproducing organisms by having the same during gametogenesis

3. In meiosis, paternal and maternal chromosomes assort independently. It causes a reshuffling of chromosomes and the traits controlled by them. The variations help the breeders in improving the races of useful plants and animals.

4. Meiosis introduces a new combination of traits or variations.

5. Chromosomal and genomic mutations occur by irregularities of meiotic division. Some of these mutations are useful to the organism.

Solutions for NCERT Class 11 Biology Chapter 10 Cell Cycle and Cell Division:

Q13. Discuss with your teacher about

(i) haploid insects and lower plants where cell-division occurs

Answer:

In some lower plants and haploid insects such as drones of a honey bee, meiosis occurs in the zygote. This type of meiosis is called zygotic meiosis whereas this type of life cycle is called haplontic life cycle.

Q13. Discuss with your teacher about

(ii) some haploid cells in higher plants where cell-division does not occur.

Answer:

Synergids and antipodals are haploid cells in higher plants where cell division does not occur.

Q14. Can there be mitosis without DNA replication in 'S' phase?

Answer:

Without DNA replication in 'S' phase, mitosis cannot occur. During DNA replication, DNA duplicates and this is a very important step. If DNA duplication does not occur than even in mitosis, there will be a reduction in the number of chromosomes of daughter cells. Thus, mitosis cannot occur without DNA replication.

Q15. Can there be DNA replication without cell division?

Answer:

Yes, DNA replication can occur without being followed by cell division. For example, polyteny is a condition in which chromosomes repeatedly replicates but the cells do not divide and as a result of this, DNA accumulates in the cell.

NCERT Solutions for Class 11 Biology Chapter 10 Cell Cycle and Cell Division:

Q16. Analyse the events during every stage of cell cycle and notice how the following two parameters change

(i) number of chromosomes (N) per cell

Answer:

The number of chromosomes (N) per cell changes during the anaphase I stage of meiosis I. During this stage, the homologous chromosomes get separated and starts moving towards the opposite poles. Thus, the bivalents get divided into sister chromatids. This leads to a reduction of the number of chromosomes to half in daughter cells.

Q16. Analyse the events during every stage of cell cycle and notice how the following two parameters change

(ii) amount of DNA content (C) per cell

Answer:

The amount of DNA content per cell changes during 'S' phase and anaphase. In 'S' phase, the number of chromosomes remains the same but DNA replicates. Due to DNA replication, the content of DNA doubles up from 1C to 2C or from 2C to 4C depending on whether the cell is diploid or haploid. In anaphase II, the DNA Content decreases to one half from 2C to 1C.

NCERT Solutions for Class 11 Biology Chapter 10: Cell Cycle and Cell Division

Students can anticipate this unit to be worth around 15 marks, or about 21% of the overall grade, according to the question paper format from previous years. In order to help students study effectively, the CBSE publishes examination patterns, marking schemes, and question paper designs for Class 11. Cell Cycle and Cell Division NCERT Solutions Class 11 have been updated as per the latest syllabus. These materials can be carefully examined to understand the trends over time. If you have any query in understanding Cell Cycle and Cell Division NCERT PDF which are mentioned in the above, then again go through the cell Cycle and Cell division Class 11 NCERT. And then, try to solve them by yourself and compare them with Class 11 Biology Chapter 10 Exercise Solutions. Class 11 Biology Chapter 10 NCERT Solutions will help you not only for your school exam as it will also help you in the preparation of other competitive exams like NEET.

Important Topics of NCERT Solutions for Class 11 Biology Chapter 10 - Cell Cycle and Cell Division

The important topics and subtopics of Cell Cycle and Cell Division Class 11 NCERT Solutions are given below:

10.1 Cell Cycle

  • 10.1.1 Phases of Cell Cycle

10.2 M Phase

  • 10.2.1 Prophase
  • 10.2.2 Metaphase
  • 10.2.3 Anaphase
  • 10.2.4 Telophase
  • 10.2.5 Cytokinesis

10.3 Significance of Mitosis

10.4 Meiosis

  • 10.4.1 Meiosis I
  • 10.4.2 Meiosis II

10.5 Significance of Meiosis

Highlights of NCERT Solutions for Class 11 Biology Chapter 10 - Cell Cycle and Cell Division

Highlights for the Cell Cycle and Cell Division NCERT PDF are given below:

  • The Solutions for Cell Division Class 11 Exercise are written in the most readable and understandable way possible using straightforward language.
  • Points are used to frame responses in the Cell Cycle and Cell Division NCERT Solutions to aid in quick comprehension.
  • The questions and answers provided by the subject expert for the Class 11 Biology Chapter 10 Exercise Solutions were taken directly from the Biology Class 11 Textbook.
  • Cell Cycle and Cell Division Class 11 Questions and Answers follow the most recent CBSE Syllabus. NCERT pdf download is widely accessible and cost nothing.
  • Class 11 Biology Chapter 10 NCERT Solutions include a list of important topics.
  • ch 10 bio class 11 are a fantastic source of knowledge.
  • Cell Ccycle and Cell Division Class 11 Solutions will also help you prepare for competitive exams like NEET.
  • Cell cycle and cell division class 11 NCERT will enhance your knowledge of and interest in biology.
  • Your learning will start with NCERT, and it's simple to access cell division NCERT.

NCERT Solutions for Class 11 Biology: Chapter-wise

NCERT Solutions for Class 11: Subject-wise

Check the NCERT Books and NCERT Syllabus here:

Frequently Asked Questions (FAQs)

1. What are the benefits of cell cycle and cell division ncert pdf?
  • NCERT is the base of your learning.  
  • You will get all the answers to cell cycle and cell division class 11th and cell cycle and cell division class 11 ncert pdf will help you to score good marks in the exam.  
  • NCERT solutions for class 11 biology chapter 10 cell cycle and cell division will also help you with competitive exams like NEET.  
  • cell cycle and cell division ncert pdf will also help you in your 12th board exam.  
  • cell cycle and cell division ncert will also boost your knowledge. 
  • To score well in the examination, follow the NCERT syllabus and solve the exercise given in the NCERT Book. To practice more problems, students must refer to NCERT Exemplar.
2. What are the important topics of cell cycle and cell division class 11 ncert pdf?
  • Cell Cycle 
  • M Phase  
  • Significance of Mitosis  
  • Meiosis  
  • Significance of Meiosis 
3. Name those phases in which inter-phase is divided?
  • G 1 phase (Gap 1) 
  • S phase (Synthesis)  
  • G 2 phase (Gap 2)
4. What is S Phase given in cell cycle ncert?

In this phase, chromosomes along with their DNA replicates. The content of DNA doubles up, however, the number of chromosomes remains the same. After replication, the daughter chromosomes remain attached in the region of the centromere. The centrosome, if present begins to divide.

5. What is G2 phase given in cell cycle and cell division ncert?

This phase is characterised by increased synthesis of RNA and proteins. The cell organelles undergo multiplication in this phase while the cell grows in size. G2 phase is also called a second growth phase or pre-mitotic gap phase.

Articles

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

Back to top