Respiration in Plants

Q1 FREE PREVIEW

PYQ

What is the net gain of ATP when each molecule of glucose is converted to two molecules of pyruvic acid? [NEET 2022]

aTwo

bEight

cFour

dSix

✓ Correct answer: a) Two

ExplanationThe correct option is A: Two.During the breakdown of one glucose molecule into two pyruvic acid molecules through glycolysis, a total of 4 ATPs are produced.However, 2 ATP molecules are used in the preparatory phase of glycolysis.Net gain: The net gain is the total ATP produced minus the total ATP consumed, which is 4-2=2 ATP.

Q2

PYQ

Identify the step in tricarboxylic acid cycle, which does not involve oxidation of substrate. [NEET 2024]

aIsocitrate -ketoglutaric acid

bMalic acid Oxaloacetic acid

cSuccinic acid Malic acid

dSuccinyl-CoA Succinic acid

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Q3

PYQ

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

[NEET 2024]

a

Isocitrate \(\to \alpha\) -ketoglutaric acid

b

Malic acid \(\to\)Oxaloacetic acid

c

Succinic acid\(\to\) Malic acid

d

Succinyl-CoA\(\to\)Succinic acid

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Q4

PYQ

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

a

Isocitrate \(\to \alpha\) -ketoglutaric acid

b

Malic acid \(\to\)Oxaloacetic acid

c

Succinic acid\(\to\) Malic acid

d

Succinyl-CoA\(\to\)Succinic acid

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Q5

PYQ

The complex II of mitochondrial electron transport chain is also known as

[NEET 2025]

a

Cytochrome c oxidase

b

NADH dehydrogenase

c

Cytochrome bc

d

Succinate dehydrogenase

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Q6

PYQ

Match List I with List II :

List I (Process)	List II (Location)
A. Glycolysis	I. Inner mitochondrial membrane
B. ETS	II. Mitochondrial matrix
C. Accumulation of protons	III. Cytoplasm
D. Krebs' cycle	IV. Intermembrane space

Choose the correct answer from the options given below:

[NEET 2026]

a

A-I, B-IV, C-III, D-II

b

A-III, B-I, C-IV, D-II

c

A-IV, B-II, C-I, D-III

d

A-II, B-III, C-IV, D-I

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Q7

PYQ

Which of the following are correct about cellular respiration?
A. Cellular respiration is the breaking of C - C bonds of complex organic molecules by oxidation.
B. The entire cellular respiration takes place in Mitochondria.
C. Fermentation takes place under anaerobic condition in germinating seeds.
D. The fate of pyruvate formed during glycolysis depends on the type of organism also.
E. Water is formed during respiration as a result of \({O}_{2}\) accepting electrons and getting reduced.

Choose the correct answer from the options given below :

[Re-NEET 2024]

a

A, C, D, E only

b

A, B, E only

c

A, B, C, E only

d

B, C, D, E only

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Q8

PYQ

Which of the following are correct about cellular respiration?
A. Cellular respiration is the breaking of C - C bonds of complex organic molecules by oxidation.
B. The entire cellular respiration takes place in Mitochondria.
C. Fermentation takes place under anaerobic condition in germinating seeds.
D. The fate of pyruvate formed during glycolysis depends on the type of organism also.
E. Water is formed during respiration as a resull of \({O}_{2}\) accepting electrons and getting reduced. Choose the correct answer from the options given below :

[Re-NEET 2024]

a

A, C, D, E only

b

A, B, E only

c

A, B, C, E only

d

B, C, D, E only

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Q9

PYQ

Which of the following statements is incorrect?

[NEET 2021]

a

In ETC (Electron Transport Chain), one molecule of \(\mathrm{NADH}+{\mathrm{H}}^{+}\)gives rise to 2 ATP molecules, and one \({\mathrm{FADH}}_{2}\) gives rise to 3 ATP molecules.

b

ATP is synthesized through complex V.

c

Oxidation - reduction reactions produce proton gradient in respiration,

d

During aerobic respiration, role of oxygen is limited to the terminal stage.

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Q10

PYQ

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-bisphosphate.

In the light of the above statements, choose the correct answer from the options given below :

a

Both A and R are true but R is NOT the correct explanation of A.

b

A is true but R is false.

c

A is false but R is true.

d

Both A and R are true and R is the correct explanation of A.

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Q11

PYQ

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 :

[NEET 2023]

a

Both A and R are true but R is NOT the correct explanation of A.

b

A is true but R is false.

c

A is false but R is true.

d

Both A and R are true and R is the correct explanation of A.

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Q12

PYQ

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

[NEET 2020]

a

zero

b

one

c

two

d

three

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Q13

PYQ

Pyruvate dehydrogenase activity during aerobic respiration requires.

[Re-NEET 2020]

a

Calcium

b

Cobalt

c

Iron

d

Magnesium

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