Q: Which equation correctly represents the overall process of aerobic cellular respiration?

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

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

Which equation correctly represents the overall process of 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 3

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

Accepted Answer

Oxidative phosphorylation

Question 4

Which of the following statements about glycolysis is TRUE?

Accepted Answer

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

Question 5

A patient is exposed to cyanide, which inhibits cytochrome c oxidase in the electron transport chain. What is the most immediate effect on cellular respiration?

Accepted Answer

ATP production by oxidative phosphorylation will decrease sharply.

Question 6

Which molecule is oxidized and which is reduced in the following reaction? $$	ext{C}_6	ext{H}_{12}	ext{O}_6 + 6 	ext{O}_2 ightarrow 6 	ext{CO}_2 + 6 	ext{H}_2	ext{O}$$

Accepted Answer

Glucose is oxidized; oxygen is reduced.

Question 7

Which process regenerates NAD$$^+ so $$glycolysis can continue in the absence of oxygen?

Accepted Answer

Alcoholic fermentation

Question 8

Fatty acids are metabolized by beta-oxidation. What is the direct product of this process that enters the citric acid cycle?

Accepted Answer

Acetyl-CoA

Question 9

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 to donate to the electron transport chain.

Question 10

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

Accepted Answer

Glycolysis → Pyruvate Oxidation → Citric Acid Cycle → Oxidative Phosphorylation

Question 11

A muscle cell is working hard and oxygen becomes scarce. Which pathway will the cell use to continue producing ATP?

Accepted Answer

Lactic acid fermentation

Question 12

Which of the following best describes substrate-level phosphorylation?

Accepted Answer

Direct transfer of a phosphate group from a substrate to ADP to form ATP.

Question 13

Which of the following is a product of the citric acid cycle for each acetyl-CoA molecule entering the cycle?

Accepted Answer

1 ATP, 3 NADH, 1 FADH$$_2$$, 2 CO$$_2$$

Question 14

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

Accepted Answer

The ETC pumps protons into the intermembrane space, creating a gradient used by ATP synthase.

Question 15

Which of the following is a real-life example of lactic acid fermentation?

Accepted Answer

Muscle fatigue during intense exercise

Question 16

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

Accepted Answer

Glycolysis

Question 17

Which of the following best explains why the number of ATP molecules produced from one glucose molecule is not always exactly 32?

Accepted Answer

Some protons leak across the mitochondrial membrane, and electron shuttles may transfer electrons to FAD instead of NAD$$^+.$$

Question 18

Which of the following is a correct description of chemiosmosis?

Accepted Answer

The use of a proton gradient to drive the synthesis of ATP.

Question 19

Which of the following is a major difference between fermentation and anaerobic respiration?

Accepted Answer

Anaerobic respiration uses an electron transport chain with a final electron acceptor other than oxygen, while fermentation does not use an electron transport chain.

Chapter 7

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드