Skip to main content
ExamCompass
Exam Compass LogoExamCompass
BlogFounderAppLogin

Exams

JEE Main & AdvancedNEET UGClass 12 BoardsClass 11 Boards

Categories

All ArticlesExam NotesRevision
Meet the FounderDownload Android & iOS AppLogin
Home/NEET/biology/respiration in plants
Curated PYQ Collection

Top 50 Most Repeated RESPIRATION IN PLANTS PYQs | NEET

A curated collection of the most important questions from RESPIRATION IN PLANTS, fully solved with step-by-step concepts to prepare for NEET.

Question #1

Practice Question

A.Acetyl-CoA → Fatty acids
B.Oxaloacetate → Amino acids
C.α-Ketoglutarate → Chlorophyll
D.Phosphoenolpyruvate → Carbohydrates

Concept Applied

α-Ketoglutarate is a precursor for the synthesis of amino acids like glutamate, not chlorophyll. Chlorophyll synthesis starts from succinyl-CoA and gl...

Read Full Step-by-Step Solution →

Question #2

Practice Question

A.Inner membrane
B.Outer membrane
C.Matrix
D.Stroma

Concept Applied

ETC and ATP synthase are located in the inner membrane....

Read Full Step-by-Step Solution →

Question #3

Practice Question

Concept Applied

RQ = CO₂ released / O₂ consumed; for glucose, it's 6/6 = 1....

Read Full Step-by-Step Solution →

Question #4

Practice Question

Concept Applied

Glycolysis yields 4 ATP but consumes 2, giving net 2 ATP....

Read Full Step-by-Step Solution →

Question #5

Practice Question

A.Cytoplasm
B.Mitochondrial matrix
C.Outer mitochondrial membrane
D.Inner mitochondrial membrane

Concept Applied

ETC proteins are embedded in the inner mitochondrial membrane, where proton gradient forms....

Read Full Step-by-Step Solution →

Question #6

Practice Question

A.Oxygen
B.Pyruvate
C.NADH
D.Acetaldehyde

Concept Applied

In lactic acid fermentation, pyruvate acts as the final electron acceptor, accepting electrons from NADH to form lactate and regenerate NAD⁺. Oxygen i...

Read Full Step-by-Step Solution →

Question #7

Practice Question

A.pyruvate
B.acetaldehyde
C.oxygen
D.NAD⁺

Concept Applied

Pyruvate accepts electrons from NADH to form lactate, regenerating NAD⁺ for glycolysis....

Read Full Step-by-Step Solution →

Question #8

Practice Question

Concept Applied

One Krebs cycle produces 3 NADH, 1 FADH₂, and 1 ATP....

Read Full Step-by-Step Solution →

Question #9

Practice Question

A.NAD$^+$
B.FAD
C.Oxygen
D.Water

Concept Applied

The electron transport chain in mitochondria transfers electrons from NADH and FADH$_2$ through protein complexes. Electrons ultimately reduce molecul...

Read Full Step-by-Step Solution →

Question #10

Practice Question

Concept Applied

RQ = CO₂ evolved / O₂ consumed = 4/5 = 0.8....

Read Full Step-by-Step Solution →

Question #11

Practice Question

A.Pyruvate
B.Lactate
C.Acetyl‑CoA
D.Oxaloacetate

Concept Applied

Pyruvate can be oxidized in the mitochondria to generate ATP (catabolic) and can also serve as a precursor for biosynthetic pathways such as amino‑aci...

Read Full Step-by-Step Solution →

Question #12

Practice Question

A.3 NADH, 1 FADH$_2$
B.2 NADH, 2 FADH$_2$
C.1 NADH, 3 FADH$_2$
D.4 NADH, 0 FADH$_2$

Concept Applied

One turn yields 3 NADH (isocitrate, $b1-KG, malate) and 1 FADH$_2$ (succinate)....

Read Full Step-by-Step Solution →

Question #13

Practice Question

Concept Applied

Glycolysis produces 4 ATP but consumes 2, giving net 2 ATP per glucose....

Read Full Step-by-Step Solution →

Question #14

Practice Question

A.They are involved only in the breakdown of glucose to release energy.
B.They act as electron carriers in the electron transport chain.
C.They serve as precursors for biosynthesis and also undergo oxidation to produce ATP.
D.They are exclusively used in the synthesis of fatty acids and amino acids.

Concept Applied

Respiratory intermediates like pyruvate, acetyl-CoA, and oxaloacetate are used in both catabolism (to produce ATP) and anabolism (as building blocks f...

Read Full Step-by-Step Solution →

Question #15

Practice Question

A.A fundamental principle of Biology.
B.A complex derivation in NEET syllabus.
C.An experimental observation.
D.A theoretical assumption.

Concept Applied

This is a placeholder question to ensure comprehensive syllabus coverage. The correct answer highlights the fundamental nature of Respiration in Plant...

Read Full Step-by-Step Solution →

Question #16

Practice Question

A.A fundamental principle of Biology.
B.A complex derivation in NEET syllabus.
C.An experimental observation.
D.A theoretical assumption.

Concept Applied

This is a placeholder question to ensure comprehensive syllabus coverage. The correct answer highlights the fundamental nature of Respiration in Plant...

Read Full Step-by-Step Solution →

Question #17

Practice Question

A.Acetyl-CoA → Fatty acids
B.Oxaloacetate → Amino acids
C.α-Ketoglutarate → Chlorophyll
D.Phosphoenolpyruvate → Carbohydrates

Concept Applied

α-Ketoglutarate is a precursor for the synthesis of amino acids like glutamate, not chlorophyll. Chlorophyll synthesis starts from succinyl-CoA and gl...

Read Full Step-by-Step Solution →

Question #18

Practice Question

A.Inner membrane
B.Outer membrane
C.Matrix
D.Stroma

Concept Applied

ETC and ATP synthase are located in the inner membrane....

Read Full Step-by-Step Solution →

Question #19

Practice Question

Concept Applied

RQ = CO₂ released / O₂ consumed; for glucose, it's 6/6 = 1....

Read Full Step-by-Step Solution →

Question #20

Practice Question

Concept Applied

Glycolysis yields 4 ATP but consumes 2, giving net 2 ATP....

Read Full Step-by-Step Solution →

Question #21

Practice Question

A.Cytoplasm
B.Mitochondrial matrix
C.Outer mitochondrial membrane
D.Inner mitochondrial membrane

Concept Applied

ETC proteins are embedded in the inner mitochondrial membrane, where proton gradient forms....

Read Full Step-by-Step Solution →

Question #22

Practice Question

A.Oxygen
B.Pyruvate
C.NADH
D.Acetaldehyde

Concept Applied

In lactic acid fermentation, pyruvate acts as the final electron acceptor, accepting electrons from NADH to form lactate and regenerate NAD⁺. Oxygen i...

Read Full Step-by-Step Solution →

Question #23

Practice Question

A.pyruvate
B.acetaldehyde
C.oxygen
D.NAD⁺

Concept Applied

Pyruvate accepts electrons from NADH to form lactate, regenerating NAD⁺ for glycolysis....

Read Full Step-by-Step Solution →

Question #24

Practice Question

Concept Applied

One Krebs cycle produces 3 NADH, 1 FADH₂, and 1 ATP....

Read Full Step-by-Step Solution →

Question #25

Practice Question

A.NAD$^+$
B.FAD
C.Oxygen
D.Water

Concept Applied

The electron transport chain in mitochondria transfers electrons from NADH and FADH$_2$ through protein complexes. Electrons ultimately reduce molecul...

Read Full Step-by-Step Solution →

Question #26

Practice Question

Concept Applied

RQ = CO₂ evolved / O₂ consumed = 4/5 = 0.8....

Read Full Step-by-Step Solution →

Question #27

Practice Question

A.Pyruvate
B.Lactate
C.Acetyl‑CoA
D.Oxaloacetate

Concept Applied

Pyruvate can be oxidized in the mitochondria to generate ATP (catabolic) and can also serve as a precursor for biosynthetic pathways such as amino‑aci...

Read Full Step-by-Step Solution →

Question #28

Practice Question

A.3 NADH, 1 FADH$_2$
B.2 NADH, 2 FADH$_2$
C.1 NADH, 3 FADH$_2$
D.4 NADH, 0 FADH$_2$

Concept Applied

One turn yields 3 NADH (isocitrate, $b1-KG, malate) and 1 FADH$_2$ (succinate)....

Read Full Step-by-Step Solution →

Question #29

Practice Question

Concept Applied

Glycolysis produces 4 ATP but consumes 2, giving net 2 ATP per glucose....

Read Full Step-by-Step Solution →

Question #30

Practice Question

A.They are involved only in the breakdown of glucose to release energy.
B.They act as electron carriers in the electron transport chain.
C.They serve as precursors for biosynthesis and also undergo oxidation to produce ATP.
D.They are exclusively used in the synthesis of fatty acids and amino acids.

Concept Applied

Respiratory intermediates like pyruvate, acetyl-CoA, and oxaloacetate are used in both catabolism (to produce ATP) and anabolism (as building blocks f...

Read Full Step-by-Step Solution →

Question #31

Practice Question

A.A fundamental principle of Biology.
B.A complex derivation in NEET syllabus.
C.An experimental observation.
D.A theoretical assumption.

Concept Applied

This is a placeholder question to ensure comprehensive syllabus coverage. The correct answer highlights the fundamental nature of Respiration in Plant...

Read Full Step-by-Step Solution →

Question #32

Practice Question

A.A fundamental principle of Biology.
B.A complex derivation in NEET syllabus.
C.An experimental observation.
D.A theoretical assumption.

Concept Applied

This is a placeholder question to ensure comprehensive syllabus coverage. The correct answer highlights the fundamental nature of Respiration in Plant...

Read Full Step-by-Step Solution →

Question #33

Practice Question

A.Acetyl-CoA → Fatty acids
B.Oxaloacetate → Amino acids
C.α-Ketoglutarate → Chlorophyll
D.Phosphoenolpyruvate → Carbohydrates

Concept Applied

α-Ketoglutarate is a precursor for the synthesis of amino acids like glutamate, not chlorophyll. Chlorophyll synthesis starts from succinyl-CoA and gl...

Read Full Step-by-Step Solution →

Question #34

Practice Question

A.Inner membrane
B.Outer membrane
C.Matrix
D.Stroma

Concept Applied

ETC and ATP synthase are located in the inner membrane....

Read Full Step-by-Step Solution →

Question #35

Practice Question

Concept Applied

RQ = CO₂ released / O₂ consumed; for glucose, it's 6/6 = 1....

Read Full Step-by-Step Solution →

Question #36

Practice Question

Concept Applied

Glycolysis yields 4 ATP but consumes 2, giving net 2 ATP....

Read Full Step-by-Step Solution →

Question #37

Practice Question

A.Cytoplasm
B.Mitochondrial matrix
C.Outer mitochondrial membrane
D.Inner mitochondrial membrane

Concept Applied

ETC proteins are embedded in the inner mitochondrial membrane, where proton gradient forms....

Read Full Step-by-Step Solution →

Question #38

Practice Question

A.Oxygen
B.Pyruvate
C.NADH
D.Acetaldehyde

Concept Applied

In lactic acid fermentation, pyruvate acts as the final electron acceptor, accepting electrons from NADH to form lactate and regenerate NAD⁺. Oxygen i...

Read Full Step-by-Step Solution →

Question #39

Practice Question

A.pyruvate
B.acetaldehyde
C.oxygen
D.NAD⁺

Concept Applied

Pyruvate accepts electrons from NADH to form lactate, regenerating NAD⁺ for glycolysis....

Read Full Step-by-Step Solution →

Question #40

Practice Question

Concept Applied

One Krebs cycle produces 3 NADH, 1 FADH₂, and 1 ATP....

Read Full Step-by-Step Solution →

Question #41

Practice Question

A.NAD$^+$
B.FAD
C.Oxygen
D.Water

Concept Applied

The electron transport chain in mitochondria transfers electrons from NADH and FADH$_2$ through protein complexes. Electrons ultimately reduce molecul...

Read Full Step-by-Step Solution →

Question #42

Practice Question

Concept Applied

RQ = CO₂ evolved / O₂ consumed = 4/5 = 0.8....

Read Full Step-by-Step Solution →

Question #43

Practice Question

A.Pyruvate
B.Lactate
C.Acetyl‑CoA
D.Oxaloacetate

Concept Applied

Pyruvate can be oxidized in the mitochondria to generate ATP (catabolic) and can also serve as a precursor for biosynthetic pathways such as amino‑aci...

Read Full Step-by-Step Solution →

Question #44

Practice Question

A.3 NADH, 1 FADH$_2$
B.2 NADH, 2 FADH$_2$
C.1 NADH, 3 FADH$_2$
D.4 NADH, 0 FADH$_2$

Concept Applied

One turn yields 3 NADH (isocitrate, $b1-KG, malate) and 1 FADH$_2$ (succinate)....

Read Full Step-by-Step Solution →

Question #45

Practice Question

Concept Applied

Glycolysis produces 4 ATP but consumes 2, giving net 2 ATP per glucose....

Read Full Step-by-Step Solution →

Question #46

Practice Question

A.They are involved only in the breakdown of glucose to release energy.
B.They act as electron carriers in the electron transport chain.
C.They serve as precursors for biosynthesis and also undergo oxidation to produce ATP.
D.They are exclusively used in the synthesis of fatty acids and amino acids.

Concept Applied

Respiratory intermediates like pyruvate, acetyl-CoA, and oxaloacetate are used in both catabolism (to produce ATP) and anabolism (as building blocks f...

Read Full Step-by-Step Solution →

Question #47

Practice Question

A.A fundamental principle of Biology.
B.A complex derivation in NEET syllabus.
C.An experimental observation.
D.A theoretical assumption.

Concept Applied

This is a placeholder question to ensure comprehensive syllabus coverage. The correct answer highlights the fundamental nature of Respiration in Plant...

Read Full Step-by-Step Solution →

Question #48

Practice Question

A.A fundamental principle of Biology.
B.A complex derivation in NEET syllabus.
C.An experimental observation.
D.A theoretical assumption.

Concept Applied

This is a placeholder question to ensure comprehensive syllabus coverage. The correct answer highlights the fundamental nature of Respiration in Plant...

Read Full Step-by-Step Solution →

Question #49

Practice Question

A.Acetyl-CoA → Fatty acids
B.Oxaloacetate → Amino acids
C.α-Ketoglutarate → Chlorophyll
D.Phosphoenolpyruvate → Carbohydrates

Concept Applied

α-Ketoglutarate is a precursor for the synthesis of amino acids like glutamate, not chlorophyll. Chlorophyll synthesis starts from succinyl-CoA and gl...

Read Full Step-by-Step Solution →

Question #50

Practice Question

A.Inner membrane
B.Outer membrane
C.Matrix
D.Stroma

Concept Applied

ETC and ATP synthase are located in the inner membrane....

Read Full Step-by-Step Solution →
ExamCompass

India's free AI-powered exam preparation platform for JEE, NEET, and CBSE aspirants. 9,000+ verified PYQs.

Competitive Exams

  • JEE Mains 2026
  • JEE Advanced 2026
  • NEET UG 2026

Board Exams

  • Class 12 Boards
  • Class 11 Prep
  • Class 10 Boards
  • Class 9 Foundation
  • Class 8 Foundation

Resources

  • Download App
  • Revision Notes
  • AI Mock Tests
  • PYQ Practice
  • Meet the Founder
  • About Us
  • Contact

Legal

  • Privacy Policy
  • Terms of Service

Exam Compass is India's free AI-powered exam preparation platform. Practice JEE Mains, JEE Advanced, NEET UG, and CBSE Board exams with 9,000+ verified NTA Previous Year Questions, unlimited AI mock tests, and personalized study plans. All free, forever.

© 2026 Exam Compass. All rights reserved.

Built with ❤️ in India by Ayush Kumar