Q: Which of the following equations correctly represents aerobic respiration?

$C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{Energy (ATP)}$

Question 1

Which of the following best describes the role of oxygen in aerobic cellular respiration?

Accepted Answer

Oxygen is the final electron acceptor in the electron transport chain.

Question 2

During glycolysis, one molecule of glucose is converted into which of the following products?

Accepted Answer

Two molecules of pyruvate

Question 3

Which metabolic process occurs in the cytosol of animal cells?

Accepted Answer

Glycolysis

Question 4

A patient with a mitochondrial disease is unable to efficiently produce ATP via oxidative phosphorylation. Which cellular process would be most directly affected?

Accepted Answer

Electron transport chain

Question 5

Which of the following equations correctly represents aerobic respiration?

Accepted Answer

$C_6H_{12}O_6 + 6O_2 ightarrow 6CO_2 + 6H_2O + 	ext{Energy (ATP)}$

Question 6

Which statement best explains why fermentation is less efficient than aerobic respiration?

Accepted Answer

Fermentation only partially breaks down glucose, yielding less ATP.

Question 7

Which coenzyme is directly involved in transferring electrons to the electron transport chain?

Accepted Answer

NADH

Question 8

In the citric acid cycle, acetyl CoA combines with a four-carbon molecule to form a six-carbon molecule. What is the name of this six-carbon molecule?

Accepted Answer

Citrate

Question 9

Which process is responsible for the majority of ATP production during cellular respiration?

Accepted Answer

Oxidative phosphorylation in the electron transport chain

Question 10

Which of the following is a product of lactic acid fermentation?

Accepted Answer

Lactic acid

Question 11

A muscle cell is deprived of oxygen during intense exercise. Which metabolic pathway will it primarily use to generate ATP?

Accepted Answer

Lactic acid fermentation

Question 12

Which of the following statements about the electron transport chain is correct?

Accepted Answer

It uses NADH and FADH$_2$ to pump protons across the mitochondrial membrane.

Question 13

Which metabolic process is shared by both fermentation and aerobic respiration?

Accepted Answer

Glycolysis

Question 14

Which of the following is NOT a possible final electron acceptor in anaerobic respiration?

Accepted Answer

Oxygen

Question 15

Which step in cellular respiration produces the most NADH per glucose molecule?

Accepted Answer

Citric acid cycle

Question 16

Which of the following best describes substrate-level phosphorylation?

Accepted Answer

ATP is produced directly by transferring a phosphate group from a high-energy substrate to ADP.

Question 17

Which of the following metabolic processes occurs in the inner mitochondrial membrane?

Accepted Answer

Electron transport chain

Question 18

A person consumes a diet high in fats. Which molecule do fatty acids enter cellular respiration as?

Accepted Answer

Acetyl CoA

Question 19

Which of the following is a direct consequence of a defect in ATP synthase?

Accepted Answer

Decreased ATP production from ADP and inorganic phosphate

Question 20

Which of the following statements about the preparatory reaction is correct?

Accepted Answer

It converts pyruvate into acetyl CoA and CO$_2$.

Cellular Metabolism: Pathways and Processes in Animal Cells

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