Back to RESPIRATION IN PLANTS

Your Progress

0 / 202 Answered

Correct

Incorrect

Accuracy

NEET • BIOLOGY • RESPIRATION IN PLANTS

Respiration in plants practice · Mixed difficulty

Choose an answer to check it, or open “View answer” to study the explanation. Sign in to save progress to your account.

Practice format and chapter quiz

The practice player uses single-correct-answer MCQs. Chapter quizzes help you review a topic; they are not full-length NEET mock papers.

Take a chapter quiz →

Showing 1-30 of 202 questions

Preparing practice and saved progress…

1 Medium

1 of 202

Remembering +4 | -1

ATP is a

View answer and explanation

Correct option: B

Nucleotide

Option B (Nucleotide) is correct because ATP (adenosine triphosphate) is a nucleotide, consisting of a nitrogenous base (adenine), a sugar (ribose), and three phosphate groups.

2 Easy

2 of 202

Remembering +4 | -1

The released energy obtained by oxidation is stored as

View answer and explanation

Correct option: C

ATP

Option C (ATP) is correct because ATP (adenosine triphosphate) is the primary energy currency of the cell, storing energy released during oxidation.

3 Hard

3 of 202

Application +4 | -1

Upon oxidation of 1 molecule of pyruvic acid in mitochondrial respiration the molecules of ATP generated are?

View answer and explanation

Correct option: D

Option D (15) is correct because the complete oxidation of one molecule of pyruvic acid yields 15 ATP molecules through the Krebs cycle and electron transport chain.

4 Hard

4 of 202

Remembering +4 | -1

The first formed substance in Kreb’s cycle is

View answer and explanation

Correct option: B

Citric acid

The correct answer is B (Citric acid) because citric acid is the first stable compound formed in the Krebs cycle, resulting from the condensation of acetyl-CoA and oxaloacetate.

5 Easy

5 of 202

Understanding +4 | -1

Respiration in plants is different from animals as

View answer and explanation

Correct option: C

Every plant part takes care of its own gas exchange needs

Option C (Every plant part takes care of its own gas exchange needs) is correct because plants do not have a centralized respiratory system like animals; each part independently exchanges gases with the environment.

6 Medium

6 of 202

Understanding +4 | -1

Which of the following process takes place in anaerobic bacteria ?

View answer and explanation

Correct option: C

Glycolysis

Option C (Glycolysis) is correct because glycolysis is the only metabolic pathway listed that can occur in the absence of oxygen, making it essential for anaerobic bacteria.

7 Easy

7 of 202

Understanding +4 | -1

Plants does not need specialised respiratory organ because

View answer and explanation

Correct option: C

Both (a) and (b)

Option C (Both (a) and (b)) is correct because plants have a lower metabolic rate and each part can handle its own gas exchange, reducing the need for specialized respiratory organs.

8 Medium

8 of 202

Remembering +4 | -1

Preparatory phase before fermentation is

View answer and explanation

Correct option: A

Upstream process

Option A (Upstream process) is correct because the preparatory phase before fermentation involves processes like media preparation and sterilization, which are upstream activities.

9 Hard

9 of 202

Understanding +4 | -1

Assertion (A): During oxidation of respiratory substrate energy does not release in a single step.

Reason (R): Breakdown of respiratory substrate in single step leads to unfavourable changes in cell temperature.

View answer and explanation

Correct option: A

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Option A (Both (A) & (R) are true and the (R) is the correct explanation of the (A)) is correct because the energy release in respiration is indeed stepwise to prevent damaging temperature changes.

10 Easy

10 of 202

Understanding +4 | -1

Assertion: The breakdown of glucose to pyruvic acid is
called glycolysis
Reason: For complete oxidation of glucose organism adopt
Kreb’s cycle

View answer and explanation

Correct option: B

If both the assertion and reason are true but the reason is
not a correct explanation of the
assertion

Option B (If both the assertion and reason are true but the reason is not a correct explanation of the assertion) is correct because both statements are true, but Krebs cycle is not the reason why glucose breaks down to pyruvic acid.

11 Hard

11 of 202

Understanding +4 | -1

Assertion (A): It is better to consider the respiratory pathway as an amphibolic pathway rather than only as a catabolic one.

Reason (R): Breaking down processes within the living organism is catabolism, and synthesis is anabolism.

View answer and explanation

Correct option: B

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

Option B (Both (A) & (R) are true but the (R) is not the correct explanation of the (A)) is correct because while both the assertion and reason are true, the reason doesn't fully explain why the respiratory pathway is considered amphibolic.

12 Easy

12 of 202

Understanding +4 | -1

During starvation, RQ value will be

View answer and explanation

Correct option: B

less than unity

Option B is correct because during starvation, the body primarily utilizes fats and proteins as respiratory substrates, which have RQ values less than unity.

13 Medium

13 of 202

Remembering +4 | -1

Anaerobic respiration takes place in

View answer and explanation

Correct option: C

Cytoplasm

Option C (Cytoplasm) is correct because anaerobic respiration, which does not require oxygen, takes place in the cytoplasm of the cell.

14 Hard

14 of 202

Remembering +4 | -1

ETS present in the?

View answer and explanation

Correct option: A

Inner mitochondrial membrane

The correct answer is A (Inner mitochondrial membrane) because the electron transport system (ETS) is embedded in the inner mitochondrial membrane.

15 Easy

15 of 202

Understanding +4 | -1

The intermediate compound common for aerobic and anaerobic respiration is

View answer and explanation

Correct option: B

Pyruvic acid

The correct answer is B (Pyruvic acid) because pyruvic acid is the end product of glycolysis, which is a common pathway for both aerobic and anaerobic respiration.

Explore Other Chapters in BIOLOGY

View All →

ANIMAL KINGDOM 756 MCQs PLANT KINGDOM 415 MCQs ANATOMY OF FLOWERING PLANTS 404 MCQs MOLECULAR BASIS OF INHERITANCE 404 MCQs CHEMICAL COORDINATION AND INTEGRATION 387 MCQs PRINCIPLE OF INHERITANCE AND VARIATION 374 MCQs

16 Medium

16 of 202

Application +4 | -1

2{C_{51}}{H_{98}}{O_6} + 146{O_2} \to 102\,C{O_2} + 98\,{H_2}O

, the RQ of above equation is?

View answer and explanation

Correct option: A

0.7

Option A (0.7) is correct because the respiratory quotient (RQ) is calculated as the ratio of CO2 produced to O2 consumed, which in this case is 102/146 ≈ 0.7.

17 Easy

17 of 202

Remembering +4 | -1

Energy currency of the cell is?

View answer and explanation

Correct option: B

ATP

Option B (ATP) is correct because ATP (Adenosine Triphosphate) is the primary energy currency used by cells for various metabolic processes.

18 Easy

18 of 202

Remembering +4 | -1

In respiration breaking down of glucose with oxygen is known as

View answer and explanation

Correct option: A

Oxidation process

Option A is correct because respiration involves the breaking down of glucose with oxygen, which is an oxidation process.

19 Easy

19 of 202

Remembering +4 | -1

Ultimate source of energy in biosphere, is

View answer and explanation

Correct option: A

Sunlight

Option A (Sunlight) is correct because sunlight is the ultimate source of energy for almost all life on Earth, driving photosynthesis.

20 Medium

20 of 202

Understanding +4 | -1

What is the net ATP molecules gain, when 4 molecules of glucose undergo anaerobic respiration in plant?

View answer and explanation

Correct option: A

8 ATP

Option A (8 ATP) is correct because anaerobic respiration (fermentation) yields a net gain of 2 ATP molecules per glucose molecule. Therefore, 4 glucose molecules will yield 4 * 2 = 8 ATP molecules.

21 Medium

21 of 202

Remembering +4 | -1

Gaseous exchange in woody plants occurs through

View answer and explanation

Correct option: C

Lenticels – Stomata

Option C (Lenticels – Stomata) is correct because lenticels facilitate gas exchange in woody stems, while stomata are present in leaves for gas exchange.

22 Easy

22 of 202

Understanding +4 | -1

Conversion of 3-PGA to 2-PGA in glycolysis is an example for?

View answer and explanation

Correct option: B

Intramolecular shift

Option B (Intramolecular shift) is correct because the conversion of 3-PGA to 2-PGA involves moving the phosphate group within the same molecule.

23 Easy

23 of 202

Understanding +4 | -1

Which one of the following is not included in glycolysis?

View answer and explanation

Correct option: B

The end products are

C{{O}_{2}}

and

{{H}_{2}}O.

Option B (The end products are

C{{O}_{2}}

and

{{H}_{2}}O.

) is correct because

C{{O}_{2}}

and

{{H}_{2}}O

are the end products of aerobic respiration (Krebs cycle and ETC), not glycolysis. Glycolysis ends with pyruvate.

24 Hard

24 of 202

Understanding +4 | -1

RQ value is an infinity during?

View answer and explanation

Correct option: D

Anaerobic respiration of carbohydrates as substrate

Option D is correct because during anaerobic respiration of carbohydrates, oxygen is not consumed, but carbon dioxide is produced, making the RQ value infinite.

25 Medium

25 of 202

Remembering +4 | -1

Which one of the following is the terminal electron acceptor?

View answer and explanation

Correct option: B

Molecular

{O_2}

Option B (Molecular

{O_2}

) is correct because molecular oxygen is the final electron acceptor in the electron transport chain during aerobic respiration.

26 Easy

26 of 202

Understanding +4 | -1

Aerobic respiration is

View answer and explanation

Correct option: B

The process in which complete oxidation of organic substances in the presence of oxygen

The correct answer is B (The process in which complete oxidation of organic substances in the presence of oxygen) because aerobic respiration requires oxygen to completely oxidize organic molecules, yielding a large amount of ATP.

27 Medium

27 of 202

Remembering +4 | -1

In respiration, respiratory substances can be used

View answer and explanation

Correct option: D

All of these

Option D (All of these) is correct because carbohydrates, proteins, and organic acids can all be used as respiratory substances.

28 Medium

28 of 202

Remembering +4 | -1

Conversion of glucose to glucose 6-phosphate in EMP pathway is catalysed by

View answer and explanation

Correct option: D

Hexokinase

Option D is correct because hexokinase catalyzes the phosphorylation of glucose to glucose-6-phosphate in the first step of glycolysis.

29 Medium

29 of 202

Understanding +4 | -1

Aerobic respiratory pathway is appropriately termed as

View answer and explanation

Correct option: C

Amphibolic

Option C (Amphibolic) is correct because the aerobic respiratory pathway involves both catabolic (breakdown) and anabolic (synthesis) processes.

30 Hard

30 of 202

Understanding +4 | -1

If fatty acids to be respired, they would first be degraded to

View answer and explanation

Correct option: C

Acetyl Co. A

Option C (Acetyl Co. A) is correct because fatty acids are broken down into Acetyl Co. A through beta-oxidation before entering the Krebs cycle.

Revision notes and key takeaways

Review RESPIRATION IN PLANTS in your textbook or class notes, then use this set to check your understanding.

Key Takeaways

✓ This set contains 202 single-correct-answer MCQs on RESPIRATION IN PLANTS.
✓ Try each question before opening its answer. Read the explanation where one is available.
✓ Sign in to save submitted answers. Revisit incorrect answers alongside your textbook or class notes.

Showing 1-30 of 202 questions

Your Progress

Respiration in plants practice · Mixed difficulty

Explore Other Chapters in BIOLOGY

Key Takeaways

Continue Your Practice

Your practice