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NCERT Solutions for Class 11 Biology Chapter 14 Respiration in Plants: According to the CBSE Syllabus 2023–24, Respiration in Plants NCERT chapter of Biology Class 11 has been renumbered as Chapter 12. Class 11 Biology NCERT Solutions are now available in PDF format. So students can download Solutions for Respiration in Plants NCERT PDF. You may have wondered, Where does all this energy come from? When you go through the NCERT Solutions for Biology, you will learn that we eat food for energy, but the question is: how is energy taken from food? How is this energy utilized? Do all foods provide the same amount of energy? Do plants ‘eat’?. To know the answer to such questions, you need to go through the NCERT Solutions for Class 11 Biology Chapter 14 Respiration in Plants. Each chapter of the Class 11 NCERT Textbook is thoroughly explained in the NCERT Solutions for Class 11. For all of the solutions, these act as resources including Chapter 14 Bio Class 11 NCERT Solutions. Therefore, there is no need to worry about students missing out on crucial information or asking crucial questions when they consult Respiration in Plants Class 11 NCERT Solutions.
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Respiration in Plants Class 11 NCERT PDF will tell you that all the energy that is required for ‘life’ processes is obtained by the oxidation of some macromolecules that we call ‘food’. In CBSE NCERT Solutions for Class 11 Biology Chapter 14 Respiration in plants, you will get all the answers to these questions that are mentioned in the Respiration NCERT Chapter. According to the Class 11 Biology Chapter 14 NCERT Solutions, only green plants and cyanobacteria can prepare their own food; through the process of photosynthesis. They trap light energy and convert it into chemical energy that is stored in the bonds of carbohydrates like glucose, sucrose, and starch. If you are looking for an answer from any other chapter, even from any other class then go with Classwise NCERT Solutions, there you will also get Chapter 14 Biology Class 11 NCERT Solutions.
Biology Class 11: Respiration in Plants NCERT PDF will also tell you about the pathway of respiration in plants. The respiratory pathway is an amphibolic pathway as it involves both anabolism and catabolism. The respiratory quotient depends on the type of respiratory substance used during respiration. Ch 14 Bio Class 11 NCERT Solutions contain questions and answers based on the all concept of NCERT Respiration in Plants. Respiration in Plants Class 11 Questions and Answers have detailed explanation for better understanding.
After going through Respiration NCERT, you must be able to understand all the answers which are mentioned in Respiration in Plants Class 11 NCERT PDF:
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The complete Class 11 Biology Chapter 14 NCERT Solutions are given below:
(a) Respiration and Combustion
Answer:
Respiration | Combustion |
It takes place inside the living cells | It is a non-cellular process |
It is a biochemical process | It is a physiochemical process |
Energy is released in steps as chemical bonds are broken in steps | Energy is released in a single step as all chemical reactions take place simultaneously |
Most of the energy is in the form of ATP | ATP formation does not occur |
It requires enzymes | It is non-enzymatic process |
(b) Glycolysis and Krebs’ cycle
Answer:
Glycolysis | Krebs cycle |
Glycolysis takes place inside the cytoplasm | It occurs inside mitochondria |
It is a straight or linear pathway | It is a cyclic process |
This process is common to both aerobic and anaerobic respiration | This process occurs only in aerobic respiration |
It breaks down one molecule of glucose into two molecules of pyruvate | It breaks down pyruvate completely into carbon dioxide and water |
It consumes two ATP molecules | It does not consume ATP |
Q1. Differentiate between (c) Aerobic respiration and Fermentation
Answer:
Aerobic respiration | Fermentation |
It is an intracellular process | Fermentation can occur both intracellularly and extracellularly |
It is not economically exploited | It is economically exploited in the production of wine, bread etc. |
It is a type of respiration that utilises oxygen to breakdown a respiratory substrate. | It is an enzyme controlled breakdown and transformation of organic nutrients |
NCERT Solutions for Class 11 Biology Chapter 14 Respiration in Plants
Q2. What are respiratory substrates? Name the most common respiratory substrate.
Answer:
Respiratory substrates are those organic substances which are oxidised during respiration to liberate energy inside the living cells. The common respiratory substrates are carbohydrates, proteins, fats and organic acids.
Q3. Give the schematic representation of glycolysis?
Answer:
Schematic representation of glycolysis is as follows:
Q4. What are the main steps in aerobic respiration? Where does it take place?
Answer:
The main steps of aerobic respiration are as follows:
1. Glycolysis- Cytoplasm
2. Krebs cycle- Matrix of mitochondria
3. Electron transport system- Inner mitochondrial membrane
4. Oxidative phosphorylation- Oxysome in the inner mitochondrial membrane.
Solutions for NCERT Class 11 Biology Chapter 14 Respiration in Plants
Q5. Give the schematic representation of an overall view of Krebs' cycle.
Answer:
Schematic representation of the Krebs cycle
Q7. Distinguish between the following:
(a) Aerobic respiration and Anaerobic respiration
Answer:
Aerobic respiration | Anaerobic respiration |
It involves the exchange of gases | Exchange of gases is absent |
It uses oxygen for breaking the respiratory material into simple substances | It does not use oxygen for the breakdown of respiratory substrates. |
Respiratory material is completely broken | Respiratory material is partially broken |
It involves electron transport | Electron transport is absent |
Q7. Distinguish between the following:
(b) Glycolysis and Fermentation
Answer:
Glycolysis | Fermentation |
It is the first step of respiration which occurs without the requirement of oxygen and is common to both aerobic and anaerobic modes of respiration | It is anaerobic respiration or respiration which does not require oxygen |
Glycolysis produces pyruvic acid | Fermentation produces different products such as ethanol and lactic acid. |
IT produces two molecules of NADH per glucose molecule | It uses NADH produced during glycolysis. |
Q7. Distinguish between the following:
(c) Glycolysis and Citric acid Cycle
Answer:
Glycolysis | Citric acid cycle |
It takes place inside the cytoplasm | It takes place in mitochondria |
It is the first step of respiration in which glucose is broken down to the level of pyruvate. | It is the second step of respiration wherein an active acetyl group is broken down completely |
Q8. What are the assumptions made during the calculation of net gain of ATP?
Answer:
The assumptions made during the calculation of net gain of ATP are as follows:
1. It is assumed that various parts of aerobic respiration such as glycolysis, TCA cycle, and ETS occur in a sequential and orderly pathway.
2. NADH produced during the process of glycolysis enters into mitochondria to undergo oxidative phosphorylation.
3. The glucose molecule is assumed to be the only substrate while it is assumed that no other molecule enters the pathway at intermediate stages.
4. The intermediates produced during respiration are not utilized in any other process.
Class 11 Ch 14 Bio NCERT Solutions
Q9. Discuss "The respiratory pathway is an amphibolic pathway."
Answer:
The respiratory pathway is an amphibolic pathway
An amphibolic pathway refers to a pathway in which both catabolic and anabolic reactions take place. The products of some reactions are used to synthesise other products. Carbohydrates are broken down to glucose before entering respiratory pathways. Fats get converted into fatty acids and glycerol whereas fatty acids get converted into acetyl CoA before entering the respiration. In a similar manner, proteins are converted into amino acids, which enter respiration after deamination. During the synthesis of fatty acids, acetyl CoA is withdrawn from the respiratory pathway. Also, in the synthesis of proteins, respiratory substrates get withdrawn. Thus, respiration involves both anabolism and catabolism in anabolism. Therefore, respiration can be termed as an amphibolic pathway as it involves both anabolism and catabolism.
Q10. Define RQ. What is its value for fats?
Answer:
The respiratory quotient is defined as the ratio of the volume of evolved to the volume of consumed during respiration. The value of respiratory quotient depends on the type of respiratory substrate. The value of RQ for various respiratory substrates is as follows:
Carbohydrates- 1
Fat - 0.7
Organic acids- more than 1
Proteins - less than 1
NCERT Solutions for Class 11 Biology Chapter 14 Respiration in Plants
Q11. What is oxidative phosphorylation?
Answer:
Oxidative phosphorylation
Oxidative phosphorylation is the synthesis of energy-rich ATP molecules with the help of energy liberated during oxidation of reduced coenzymes ( NADH and FADH2 ) produced in respiration. TH enzyme required for the synthesis is called ATP synthase. It is the fifth complex of ETS. During this process, a number of oxidation-reduction reactions occur and lead to the generation of a proton gradient. The enzyme ATP synthase (complex V) consists of and components. The Fl headpiece is a peripheral membrane protein complex and contains the site for ATP synthesis from ADP and inorganic phosphate whereas component is a part of the membrane protein complex, which acts as a channel for the crossing of the protons from the inner mitochondrial membrane to the mitochondrial matrix. For every two protons passing through complex, synthesis of one ATP molecule takes place.
Q12. What is the significance of step-wise release of energy in respiration?
Answer:
The process of respiration takes place in a stepwise manner including steps like glycolysis, TCA cycle, ETS, and oxidative phosphorylation. During respiration, the production of ATP also in each phase takes place in a stepwise manner. The products formed in one step of respiration become the substrate of the other pathway. Various molecules produced during respiration are involved in other biochemical processes also. Different respiratory substrates enter and withdraw from the pathway on necessity. The ATP also gets utilized wherever required and the rate of reactions of enzymes is also controlled. Therefore, the stepwise release of energy makes the system more efficient in extracting as well as storing energy.
The important topics and subtopics of Respiration in Plants Class 11 PDF are given below:
14.1 Do Plants Breathe?
14.2 Glycolysis
14.3 Fermentation
14.4 Aerobic Respiration
14.4.1 Tricarboxylic Acid Cycle
14.4.2 Electron Transport System (ETS) and Oxidative Phosphorylation
14.5 The Respiratory Balance Sheet
14.6 Amphibolic Pathway
14.7 Respiratory Quotient
The latest CBSE syllabus classifies the NCERT Solutions for Class 11 Biology Chapter 14 – Respiration in Plants, under Unit 4 – Plant Physiology. It is an important part of the unit. Nearly 25% of the total marks, or roughly 18 marks, come from this unit. This information is compiled from historical trends to provide a sense of the topic's importance. If you have any queries in understanding Respiration in Plants Class 11 Questions and Answers which are mentioned in the Respiration in Plants Class 11 NCERT PDF, then again go through the Respiration in Plants NCERT. And try to solve questions of Respiration Class 11 NCERT by yourself and compare them with Respiration in Plants Class 11 NCERT Solutions. As this will help you not only for your school exam as it will also help you in the preparation of other competitive exams like NEET as you may encounter several concept from Class 11 Bio Ch 14 NCERT Solutions.
Chapter 1 | The Living World |
Chapter 2 | Biological Classification |
Chapter 3 | Plant Kingdom |
Chapter 4 | Animal Kingdom |
Chapter 5 | Morphology of Flowering Plants |
Chapter 6 | Anatomy of Flowering Plants |
Chapter 7 | Structural Organisation in Animals |
Chapter 8 | Cell: The Unit of Life |
Chapter 9 | Biomolecules |
Chapter 10 | Cell Cycle and Cell Division |
Chapter 11 | Transport in Plants |
Chapter 12 | Mineral Nutrition |
Chapter 13 | Photosynthesis in Higher Plants |
Chapter 14 | Respiration in Plants |
Chapter 15 | Plant Growth and Development |
Chapter 16 | Digestion and Absorption |
Chapter 17 | Breathing and Exchange of Gases |
Chapter 18 | Body Fluids and Circulation |
Chapter 19 | Excretory Products and their Elimination |
Chapter 20 | Locomotion and Movement |
Chapter 21 | Neural Control and Coordination |
Chapter 22 | Chemical Coordination and Integration |
These are the important topics of ncert respiration in plants:
Oxidative phosphorylation is the synthesis of energy-rich ATP molecules with the help of energy liberated during oxidation of reduced coenzymes ( NADH and FADH2 ) produced in respiration. TH enzyme required for the synthesis is called ATP synthase. It is the fifth complex of ETS. During this process, a number of oxidation-reduction reactions occur and lead to the generation of a proton gradient.
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