Question 1

Which of the following best describes substrate-level phosphorylation during cellular respiration?

Accepted Answer

It directly transfers a phosphate group from a substrate to ADP using an enzyme.

Question 2

During glycolysis, glucose is broken down into which of the following products?

Accepted Answer

2 molecules of pyruvate

Question 3

Where does glycolysis occur within a eukaryotic cell?

Accepted Answer

Cytoplasm

Question 4

Which of the following is NOT a product of pyruvate oxidation per glucose molecule?

Accepted Answer

FADH2

Question 5

What is the main purpose of the Krebs Cycle in aerobic cellular respiration?

Accepted Answer

To oxidize acetyl-CoA and generate NADH and FADH2 for the electron transport chain

Question 6

How many rounds of the Krebs Cycle occur for each molecule of glucose?

Accepted Answer

2

Question 7

Which molecule serves as the final electron acceptor in the electron transport chain?

Accepted Answer

Oxygen gas (O2)

Question 8

What is the primary role of chemiosmosis in cellular respiration?

Accepted Answer

To use the H+ gradient to drive ATP synthesis via ATP synthase

Question 9

Which of the following best explains why the electron transport chain is essential for ATP production?

Accepted Answer

It creates a proton gradient that powers ATP synthase.

Question 10

What is the total number of ATP molecules produced from the complete oxidation of one glucose molecule during aerobic cellular respiration?

Accepted Answer

30-38

Question 11

Which of the following statements about glycolysis is TRUE?

Accepted Answer

It produces a net gain of 2 ATP per glucose molecule.

Question 12

During aerobic respiration, where is the majority of ATP generated?

Accepted Answer

Electron Transport Chain and Chemiosmosis

Question 13

Which of the following is a direct product of the electron transport chain?

Accepted Answer

Water (H2O)

Question 14

What is the source of the oxygen atom utilized to create water molecules during aerobic cellular respiration?

Accepted Answer

Oxygen gas (O2)

Question 15

Which of the following best describes the energy investment phase of glycolysis?

Accepted Answer

It requires the input of 2 ATP molecules.

Question 16

Which of the following is NOT a function of the Krebs Cycle?

Accepted Answer

Direct reduction of oxygen to water

Question 17

Which process is responsible for the majority of ATP production in aerobic respiration?

Accepted Answer

Oxidative phosphorylation

Question 18

Which of the following is a correct sequence of the stages of aerobic cellular respiration?

Accepted Answer

Glycolysis → Pyruvate Oxidation → Krebs Cycle → Electron Transport Chain

Question 19

Which of the following molecules stores the potential energy to produce more ATP after the first three stages of cellular respiration?

Accepted Answer

NADH and FADH2

Question 20

What is the main function of ATP synthase in the mitochondria?

Accepted Answer

To facilitate the diffusion of H+ ions and synthesize ATP from ADP and Pi

Aerobic Cellular Respiration: Pathways and Mechanisms

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