NEET Respiration in Plants PYQ practice sheet

11 previous-year NEET Botany questions from Respiration in Plants, newest papers first. Respiration in Plants carries 12 of the Botany questions in NEET 2020 to 2026, so this is a good place to test yourself after revising the chapter. Marking: +4 correct, −1 wrong.

1. 1.

   RE-NEET 2026

   How many molecules of pyruvic acid are produced at the end of glycolysis from 206 molecules of glucose?

   • (A)
     309
   • (B)
     206
   • (C)
     412
   • (D)
     103
2. 2.

   NEET 2026

   $\mathrm{2(C_{51}H_{98}O_6)+145\,O_2\to102\,CO_2+98\,H_2O+energy}$ The Respiratory Quotient (RQ) of a biomolecule used for respiration, as per the above equation would be:

   • (A)
     Between 1.25 and 2
   • (B)
     Between 0.5 and 0.95
   • (C)
     Less than 0.5
   • (D)
     1.0
3. 3.

   NEET 2026

   Match List-I with List-II: List-I (Process): A. Glycolysis, B. ETS, C. Accumulation of protons, D. Krebs' cycle List-II (Location): I. Inner mitochondrial membrane, II. Mitochondrial matrix, III. Cytoplasm, IV. Intermembrane space Choose the correct answer from the options given below:

   • (A)
     A-II, B-III, C-IV, D-I
   • (B)
     A-III, B-I, C-IV, D-II
   • (C)
     A-I, B-IV, C-III, D-II
   • (D)
     A-IV, B-II, C-I, D-III
4. 4.

   NEET 2024

   Identify the step in tricarboxylic acid cycle, which does not involve oxidation of substrate.

   • (A)
     Malic acid $\to$ Oxaloacetic acid
   • (B)
     Succinic acid $\to$ Malic acid
   • (C)
     Succinyl-CoA $\to$ Succinic acid
   • (D)
     Isocitrate $\to$ $\alpha$-ketoglutaric acid
5. 5.

   NEET 2024

   Match List-I with List-II. List-I: (A) Citric acid cycle, (B) Glycolysis, (C) Electron transport system, (D) Proton gradient List-II: (I) Cytoplasm, (II) Mitochondrial matrix, (III) Intermembrane space of mitochondria, (IV) Inner mitochondrial membrane Choose the correct answer from the options given below:

   • (A)
     A-II, B-I, C-IV, D-III
   • (B)
     A-I, B-II, C-III, D-IV
   • (C)
     A-III, B-IV, C-I, D-II
   • (D)
     A-IV, B-III, C-II, D-I
6. 6.

   NEET 2023

   Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R : Assertion A : ATP is used at two steps in glycolysis. Reason R : First ATP is used in converting glucose into glucose-6-phosphate and second ATP is used in conversion of fructose-6-phosphate into fructose-1-6-diphosphate. In the light of the above statements, choose the correct answer from the options given below :

   • (A)
     A is false but R is true.
   • (B)
     Both A and R are true and R is the correct explanation of A.
   • (C)
     Both A and R are true but R is NOT the correct explanation of A.
   • (D)
     A is true but R is false.
7. 7.

   NEET 2023

   Match List I with List II : | List I | List II | |---|---| | A. Oxidative decarboxylation | I. Citrate synthase | | B. Glycolysis | II. Pyruvate dehydrogenase | | C. Oxidative phosphorylation | III. Electron transport system | | D. Tricarboxylic acid cycle | IV. EMP pathway | Choose the correct answer from the options given below :

   • (A)
     A-II, B-IV, C-III, D-I
   • (B)
     A-III, B-IV, C-II, D-I
   • (C)
     A-II, B-IV, C-I, D-III
   • (D)
     A-III, B-I, C-II, D-IV
8. 8.

   NEET 2022

   What amount of energy is released from glucose during lactic acid fermentation?

   • (A)
     Less than 7%
   • (B)
     Approximately 15%
   • (C)
     More than 18%
   • (D)
     About 10%
9. 9.

   NEET 2022

   What is the net gain of ATP when each molecule of glucose is converted to two molecules of pyruvic acid?

   • (A)
     Eight
   • (B)
     Four
   • (C)
     Six
   • (D)
     Two
10. 10.

    NEET 2021

    Which of the following statements is incorrect ?

    • (A)
      During aerobic respiration, role of oxygen is limited to the terminal stage.
    • (B)
      Oxidation-reduction reactions produce proton gradient in respiration.
    • (C)
      In ETC (Electron Transport Chain), one molecule of NADH+H⁺ gives rise to 2 ATP molecules, and one FADH₂ gives rise to 3 ATP molecules.
    • (D)
      ATP is synthesized through complex V.
11. 11.

    NEET 2020

    The number of substrate level phosphorylations in one turn of citric acid cycle is :

    • (A)
      Zero
    • (B)
      One
    • (C)
      Two
    • (D)
      Three