$$\text{C}_6\text{H}_{12}\text{O}_6 + 6 \text{O}_2 \rightarrow 6 \text{CO}_2 + 6 \text{H}_2\text{O} + \text{Energy}$$

It allows glycolysis to continue by regenerating $$\text{NAD}^+$$

Question 1

Which of the following best describes the overall chemical equation for aerobic cellular respiration?

Accepted Answer

$$	ext{C}_6	ext{H}_{12}	ext{O}_6 + 6 	ext{O}_2 ightarrow 6 	ext{CO}_2 + 6 	ext{H}_2	ext{O} + 	ext{Energy}$$

Question 2

During which stage of cellular respiration is the majority of ATP produced?

Accepted Answer

Oxidative phosphorylation

Question 3

Which molecule acts as the final electron acceptor in the electron transport chain during aerobic respiration?

Accepted Answer

$$	ext{O}_2$$

Question 4

What is the main purpose of NADH and FADH$$_2 in $$cellular respiration?

Accepted Answer

To carry electrons to the electron transport chain

Question 5

Which process occurs in the cytoplasm and does not require oxygen?

Accepted Answer

Glycolysis

Question 6

If a poison blocks the function of ATP synthase, which process will be directly inhibited?

Accepted Answer

Chemiosmosis

Question 7

Which of the following best explains why fermentation is necessary in the absence of oxygen?

Accepted Answer

It allows glycolysis to continue by regenerating $$	ext{NAD}^+$$

Question 8

A patient has a genetic defect that prevents the formation of FAD. Which stage of cellular respiration would be most directly affected?

Accepted Answer

Citric acid cycle

Question 9

Which of the following is a correct description of a redox reaction in cellular respiration?

Accepted Answer

Glucose is oxidized to carbon dioxide

Question 10

Which of the following statements about the citric acid cycle is TRUE?

Accepted Answer

It generates NADH, FADH$$_2$$, and ATP

Question 11

In the absence of oxygen, muscle cells can continue to produce ATP by converting pyruvate into which molecule?

Accepted Answer

Lactate

Question 12

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

Accepted Answer

It is the final electron acceptor in the electron transport chain

Question 13

Which of the following is an example of substrate-level phosphorylation?

Accepted Answer

ATP production during glycolysis

Question 14

A cell is exposed to cyanide, which blocks electron flow in the electron transport chain. What is the most immediate effect?

Accepted Answer

ATP production by oxidative phosphorylation ceases

Question 15

Which of the following best explains why fats yield more ATP per gram than carbohydrates?

Accepted Answer

Fats are more reduced and have more high-energy electrons for the electron transport chain

Question 16

Which of the following is a regulatory mechanism for cellular respiration?

Accepted Answer

Negative feedback by ATP

Question 17

Which of the following is NOT a product of the citric acid cycle?

Accepted Answer

Pyruvate

Question 18

Which process is shared by both aerobic respiration and fermentation?

Accepted Answer

Glycolysis

Question 19

If a cell is unable to regenerate NAD$$^+$$, which process will stop first?

Accepted Answer

Glycolysis

Question 20

Which of the following best describes chemiosmosis?

Accepted Answer

The use of a proton gradient to drive ATP synthesis

Cellular Respiration and Fermentation: Metabolic Pathways in Biology

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