Respiration in Plants Chapter-Wise Test 13

Correct answer Carries: 4.

Wrong Answer Carries: -1.

How does fermentation differ from aerobic respiration?

Fermentation produces more ATP
Fermentation does not require oxygen
Fermentation takes place in mitochondria
Fermentation uses the Electron Transport Chain
2

Fermentation occurs in the absence of oxygen and does not involve the Electron Transport Chain.

Which molecule is regenerated at the end of the Krebs cycle?

Citrate
Acetyl-CoA
Oxaloacetate
Pyruvate
3

Oxaloacetate is regenerated at the end of the Krebs cycle to continue the cycle.

Which of the following statements about oxidative phosphorylation is CORRECT?

It occurs in the cytoplasm.
It produces ATP using a proton gradient.
It does not require oxygen.
It occurs before the Krebs cycle.
2

Oxidative phosphorylation uses a proton gradient across the inner mitochondrial membrane to generate ATP.

Which of the following is INCORRECT about ATP production?

ATP is produced in glycolysis.
The Krebs cycle does not generate ATP.
ATP synthase is involved in oxidative phosphorylation.
ATP provides energy for cellular processes.
2

The Krebs cycle does generate ATP through substrate-level phosphorylation.

Which statement about glycolysis is INCORRECT?

It occurs in the cytoplasm
It requires oxygen
It produces pyruvate
It generates ATP
2

Glycolysis is an anaerobic process, meaning it does not require oxygen to proceed.

How many carbon atoms are present in one molecule of pyruvic acid?

2
3
4
6
2

Pyruvic acid is a three-carbon molecule formed at the end of glycolysis.

Which of the following statements about glycolysis is CORRECT?

It occurs in the mitochondria.
It directly produces 38 ATP molecules per glucose.
It occurs in the cytoplasm and is the first step of respiration.
Oxygen is required for glycolysis to proceed.
3

Glycolysis occurs in the cytoplasm and is the first step in both aerobic and anaerobic respiration.

Which step of cellular respiration involves oxidative decarboxylation of pyruvate?

Glycolysis
Fermentation
Krebs cycle
Link reaction
4

The link reaction converts pyruvate to Acetyl-CoA by oxidative decarboxylation before entering the Krebs cycle.

In which part of mitochondria does the Krebs cycle take place?

Inner membrane
Intermembrane space
Matrix
Cristae
3

The Krebs cycle takes place in the mitochondrial matrix, where Acetyl-CoA is oxidized to produce ATP, NADH, and FADH₂.

Which of the following is a direct product of glycolysis?

Acetyl-CoA
Pyruvate
NAD⁺
Oxygen
2

Pyruvate is the end product of glycolysis, which can enter either aerobic or anaerobic pathways depending on oxygen availability.

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