Respiration in Plants
Test 2

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following statements about glycolysis is FALSE?

It occurs in the cytoplasm.
It produces pyruvate.
It directly requires oxygen.
It generates ATP.
3

Glycolysis is an anaerobic process and does not directly require oxygen.

Which of the following statements is TRUE regarding plant respiration?

Plants have specialized respiratory organs like animals
Only green parts of plants respire
Each plant part takes care of its own gas exchange
Plants use only oxygen for respiration
3

Each plant part carries out its own respiration using stomata, lenticels, or direct diffusion through cell surfaces.

Which step of aerobic respiration directly consumes oxygen?

Glycolysis
Krebs cycle
Electron Transport Chain
Fermentation
3

Oxygen is directly used in the Electron Transport Chain as the final electron acceptor, forming water.

Which of the following processes takes place in the inner mitochondrial membrane?

Glycolysis
Krebs cycle
Electron Transport Chain
Fermentation
3

The Electron Transport Chain takes place in the inner mitochondrial membrane, where ATP is generated.

Which of the following is INCORRECT regarding ATP production in cellular respiration?

Glycolysis produces ATP by substrate-level phosphorylation.
The Krebs cycle produces ATP by oxidative phosphorylation.
ATP synthase is responsible for ATP generation in the Electron Transport Chain.
ATP is produced during both aerobic and anaerobic respiration.
2

The Krebs cycle generates ATP through substrate-level phosphorylation, not oxidative phosphorylation.

Which of the following statements about cellular respiration is INCORRECT?

It occurs in both plant and animal cells.
It involves glycolysis, Krebs cycle, and the Electron Transport Chain.
Anaerobic respiration produces more ATP than aerobic respiration.
Oxygen is essential for aerobic respiration.
3

Anaerobic respiration produces much less ATP than aerobic respiration.

How many ATP molecules are produced per glucose molecule during glycolysis?

2
4
6
8
1

Although glycolysis produces 4 ATP, it consumes 2 ATP in earlier steps, leading to a net gain of 2 ATP per glucose molecule.

Which of the following produces the highest yield of ATP per molecule of glucose?

Glycolysis
Fermentation
Krebs cycle
Oxidative phosphorylation
4

Oxidative phosphorylation produces the most ATP by utilizing NADH and FADH₂ in the Electron Transport Chain.

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.

Which molecule enters the mitochondria to begin aerobic respiration?

Glucose
Pyruvate
NADH
FADH₂
2

Pyruvate, produced in glycolysis, enters the mitochondria to undergo oxidation in the link reaction and the Krebs cycle.

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