NCERT solutions for Biology Exemplar class 11 chapter 14 - Respiration in Plants [Latest edition]

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NCERT solutions for Biology Exemplar class 11 chapter 14 - Respiration in Plants -
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Chapter 14: Respiration in Plants

Exercises [Pages 77 - 83]

NCERT solutions for Biology Exemplar class 11 Chapter 14 Respiration in Plants Exercises [Pages 77 - 83]


Exercises | Q 1. | Page 77

The ultimate electron acceptor of respiration in an aerobic organisms is ______.

  • Cytochrome

  • Oxygen

  • Hydrogen

  • Glucose

Exercises | Q 2. | Page 77

Phosphorylation of glucose during glycolysis is catalysed by ______.

  • Phosphoglucomutase

  • Phosphoglucoisomerase

  • Hexokinase

  • Phosphorylase

Exercises | Q 3. | Page 77

Pyruvic acid, the key product of glycolysis can have many metabolic fates. Under aerobic condition it forms ______.

  • Lactic acid

  • CO2 + H2O

  • Acetyl CoA + CO2

  • Ethanol + CO2

Exercises | Q 4. | Page 77

Electron Transport System (ETS) is located in mitochondrial ______.

  • Outer membrane

  • Inter membrane space

  • Inner membrane

  • Matrix

Exercises | Q 5. | Page 77

Which of the following exhibits the highest rate of respiration?

  • Growing shoot apex

  • Germinating seed

  • Root tip

  • Leaf bud

Exercises | Q 6. | Page 78

Mitochondria are called powerhouses of the cell. Which of the following observations support this statement?

  • Mitochondria synthesise ATP

  • Mitochondria have a double membrane

  • The enzymes of the Krebs cycle are found in mitochondria

  • Mitochondria are found in almost all plants and animal cells

Exercises | Q 7. | Page 78

The end product of oxidative phosphorylation is ______.

  • NADH

  • Oxygen

  • ADP

  • ATP + H2O

Exercises | Q 8. | Page 78

Match the following and choose the correct option from those given below.

Column I Column II
A. Molecular oxygen i. α - Ketoglutaric acid
B. Electron acceptor ii. hydrogen acceptor
C. Pyruvate dehydrogenase iii. cytochrome C
D. Decarboxylation iv. acetyl Co A
  • A - ii, B - iii, C - iv, D - i

  • A - iii, B - iv, C - ii, D - i

  • A - ii, B - i, C - iii, D - iv

  • A - iv, B - iii, C - i, D - ii


Exercises | Q 1. | Page 79

Energy is released during the oxidation of compounds in respiration. How is this energy stored and released as and when it is needed?

Exercises | Q 2. | Page 79

Explain the term “Energy Currency”. Which substance acts as energy currency in plants and animals?

Exercises | Q 3. | Page 79

Different substrates get oxidized during respiration. How does Respiratory Quotient (RQ) indicate which type of substrate, i.e., carbohydrate, fat or protein is getting oxidized?

`R.Q. = A/B`

What do A and B stand for?
What type of substrates have R.Q. of 1, < 1 or > 1?

Exercises | Q 4. | Page 79

F1 particles participate in the synthesis of ______.

Exercises | Q 5. | Page 79

When does anaerobic respiration occur in man and yeast?

Exercises | Q 6. | Page 79

Which of the following will release more energy on oxidation? Arrange them in ascending order.

  1. 1 gm of fat
  2. 1 gm of protein
  3. 1 gm of glucose
  4. 0.5 g of protein + 0.5g glucose
Exercises | Q 7. | Page 79

The product of glycolysis (under hypoxia) in skeletal muscle and anaerobic fermentation in yeast are respectively ______ and ______.


Exercises | Q 1. | Page 79

If a person is feeling dizzy, glucose or fruit juice is given immediately but not a cheese sandwich Explain.

Exercises | Q 2. | Page 79

What is meant by the statement “aerobic respiration is more efficient.”?

Exercises | Q 3. | Page 80

Pyruvic acid is the end product of glycolysis. What are the three metabolic products of pyruvic acid produced under aerobic and anaerobic conditions? Write their name in the space provided in the diagram.

Exercises | Q 4. | Page 80

The energy yield in terms of ATP is higher in aerobic respiration than anaerobic respiration. Why anaerobic respiration occurs even in organisms that live in aerobic condition like human beings and angiosperms?

Exercises | Q 5. | Page 80

Oxygen is an essential requirement for aerobic respiration but it enters the respiratory process at the end? Discuss.

Exercises | Q 6. | Page 80

Respiration is an energy releasing and enzymatically controlled catabolic process which involves a step-wise oxidative breakdown of organic substances inside living cells.

In this statement about respiration explain the meaning of 1) Step-wise oxidative breakdown, and 2) Organic substances (used as substrates).

Exercises | Q 7. | Page 80

Comment on the statement – Respiration is an energy producing process but ATP is being used in some steps of the process.

Exercises | Q 8. | Page 81

The figure given below shows the steps in glycolysis. Fill in the missing steps A, B, C, D and also indicate whether ATP is being used up or released at step E?

Exercises | Q 9. | Page 81

Why is respiratory pathway referred to as an amphibolic pathway? Explain.

Exercises | Q 10. | Page 81

We commonly call ATP as the energy currency of the cell. Can you think of some other energy carriers present in a cell? Name any two.

Exercises | Q 11. | Page 81

ATP produced during glycolysis is a result of substrate level phosphorylation. Explain.

Exercises | Q 12. | Page 81

Do you know any step in the TCA cycle where there is substrate level phosphorylation. Which one?

Exercises | Q 13. | Page 82

A process is occurring throughout the day, in ‘X’ organism. Cells are participating in this process. During this process ATP, CO2 and water are evolved. It is not a light dependent process.

  1. Name the process.
  2. Is it a catabolic or an anabolic process?
  3. What could be the raw material of this process?
Exercises | Q 14. | Page 82

When a substrate is being metabolized, why does not all the energy that released in one step. It is released in multiple steps.What is the advantage of step-wise release?

Exercises | Q 15. | Page 82

Respiration requires O2. How did the first cells on the earth manage to survive in an atmosphere that lacked O2?

Exercises | Q 16. | Page 82

It is known that red muscle fibres in animals can work for longer periods of time continuously. How is this possible?

Exercises | Q 17. | Page 82

The energy yield in terms of ATP is higher in aerobic respiration than during anaerobic respiration. Explain.

Exercises | Q 18. | Page 82

RuBP carboxylase, PEP carboxylase, Pyruvate dehydrogenase, ATPase, cytochrome oxidase, Hexokinase, Lactate dehydrogenase.

Select/choose enzymes from the list above which are involved in

  1. Photosynthesis
  2. Respiration
  3. Both in photosynthesis and respiration
Exercises | Q 19. | Page 82

How does a tree trunk exchange gases with the environment although it lacks stomata?

Exercises | Q 20. | Page 82

Write any two energy yielding reactions of glycolysis.

Exercises | Q 21. | Page 82

Name the site (s) of pyruvate synthesis. Also, write the chemical reaction wherein pyruvic acid dehydrogenase acts as a catalyst.

Exercises | Q 22. | Page 82

Mention the important series of events of aerobic respiration that occur in the matrix of the mitochondrion and in the inner membrane of the mitochondrion.

Exercises | Q 23. | Page 82

Respiratory pathway is believed to be a catabolic pathway. However, nature of TCA cycle is amphibolic. Explain.


Exercises | Q 1. | Page 82

In the following flow chart, replace the symbols a,b,c and d with appropriate terms. Briefly explain the process and give any two application of it.

Exercises | Q 2. | Page 83

Given below is a diagram showing ATP synthesis during aerobic respiration, replace the symbols A, B, C, D and E by appropriate terms given in the box.

F1, Particle, Pi, 2H+, Inner mitochondrial membrane, ATP, Fo particle, ADP

Exercises | Q 3. | Page 83

Oxygen is critical for aerobic respiration. Explain its role with respect to ETS.

Exercises | Q 4. | Page 83

Enumerate the assumptions that we undertake in making the respiratory balance sheet. Are these assumptions valid for a living system? Compare fermentation and aerobic respiration in this context.

Exercises | Q 5. | Page 83

Give an account of Glycolysis. Where does it occur? What is the end product? Trace the fate of these products in both aerobic and anaerobic respiration.

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Chapter 14: Respiration in Plants

NCERT solutions for Biology Exemplar class 11 chapter 14 - Respiration in Plants -

NCERT solutions for Biology Exemplar class 11 chapter 14 - Respiration in Plants

NCERT solutions for Biology Exemplar class 11 chapter 14 (Respiration in Plants) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. has the CBSE Biology Exemplar class 11 solutions in a manner that help students grasp basic concepts better and faster.

Further, we at provide such solutions so that students can prepare for written exams. NCERT textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Biology Exemplar class 11 chapter 14 Respiration in Plants are Phases of Respiration: Glycolysis, Respiration in Plant, Respiration in Plant, Plants Breathe, Phases of Respiration: Oxidative Phosphorylation, Phases of Respiration: Fermentation, Oxidation of Pyruvate, Types of Respiration: Aerobic and Anaerobic Respiration, Phases of Respiration: Tricarboxylic Acid Cycle (Citric Acid Cycle Or Kreb’s Cycle), Respiratory Balance Sheet, Amphibolic Pathways, Respiratory Quotient (R.Q.), Exchange of Gases - in Plants, Energy Relations - Number of ATP Molecules Generated.

Using NCERT Class 11 solutions Respiration in Plants exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in NCERT Solutions are important questions that can be asked in the final exam. Maximum students of CBSE Class 11 prefer NCERT Textbook Solutions to score more in exam.

Get the free view of chapter 14 Respiration in Plants Class 11 extra questions for Biology Exemplar class 11 and can use to keep it handy for your exam preparation

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