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41 True or false? The reactions that generate the largest amounts of ATP during cellular respiration take place in the mitochondria.

A: TRUE

B: FALSE

Biochemistry MCQ
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42 Which stage of glucose metabolism produces the most ATP?

A: Krebs cycle

B: Glycolysis

C: Fermentation of pyruvate to lactate

D: Electron transport and chemiosmosis

Biochemistry MCQ
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43 Which of the following statements about the electron transport chain is true?

A: First step in cellular respiration

B: Water is the last electron acceptor

C: NADH and FADH₂ donate electrons

D: Electrons gain energy as they move down the chain

Biochemistry MCQ
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44 Into which molecule are all the carbon atoms in glucose ultimately incorporated during cellular respiration?

A: Water

B: ATP

C: NADH

D: Carbon dioxide

Biochemistry MCQ
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45 Which step of the cellular respiration pathway can take place in the absence of oxygen?

A: Krebs cycle

B: Fermentation

C: Electron transport chain

D: Glycolysis

Biochemistry MCQ
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46 Which process is not part of the cellular respiration pathway that produces large amounts of ATP in a cell?

A: Electron transport chain

B: Glycolysis

C: Krebs cycle

D: Fermentation

Biochemistry MCQ
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47 True or false? The potential energy in an ATP molecule is derived mainly from its three phosphate groups.

A: TRUE

B: FALSE

Biochemistry MCQ
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48 Which molecule is metabolized in a cell to produce energy for performing work?

A: ADP

B: Phosphate

C: ATP

D: Glucose

Biochemistry MCQ
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49 Which statement about the citric acid cycle is correct?

A: Depends on NAD+, a product of glycolysis

B: Requires molecular oxygen

C: Produces most ATP

D: Final product is substrate for first reaction

Biochemistry MCQ
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50 In glycolysis, there is a net gain of _____ ATP.

A: 3

B: 2

C: 5

D: 4

Biochemistry MCQ
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