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

Question 1

Which of the following best describes the overall equation for 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 step of cellular respiration is the majority of ATP produced?

Accepted Answer

Oxidative phosphorylation (Electron Transport Chain and Chemiosmosis)

Question 3

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

Accepted Answer

Oxygen ($$	ext{O}_2)$$

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

Where does glycolysis occur within the cell?

Accepted Answer

Cytosol

Question 6

Which of the following is a product of the citric acid cycle for each glucose molecule oxidized?

Accepted Answer

2 ATP, 6 NADH, 2 FADH$$_2$$

Question 7

Which process links glycolysis to the citric acid cycle?

Accepted Answer

Conversion of pyruvate to acetyl CoA

Question 8

In the absence of oxygen, which process allows cells to continue producing ATP?

Accepted Answer

Fermentation

Question 9

Which of the following best describes a redox reaction?

Accepted Answer

A reaction where electrons are transferred from one molecule to another

Question 10

Why is the stepwise release of energy via electron carriers important in cellular respiration?

Accepted Answer

It prevents the cell from overheating and allows efficient ATP synthesis

Question 11

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

Accepted Answer

It generates electron carriers that feed into the electron transport chain

Question 12

A patient has a genetic defect that prevents the formation of acetyl CoA. Which process would be directly affected?

Accepted Answer

Citric acid cycle

Question 13

Which of the following is an example of an oxidation reaction in cellular respiration?

Accepted Answer

Pyruvate losing electrons to form acetyl CoA

Question 14

How many net ATP molecules are produced from one molecule of glucose during glycolysis?

Accepted Answer

2

Question 15

Which of the following best explains why oxygen is required for aerobic cellular respiration?

Accepted Answer

Oxygen acts as the final electron acceptor in the electron transport chain

Question 16

If a toxin inhibits ATP synthase, which process would be directly affected?

Accepted Answer

Chemiosmosis

Question 17

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

Accepted Answer

Pyruvate

Question 18

A marathon runner relies on aerobic respiration for energy. Which of the following best explains why?

Accepted Answer

Aerobic respiration produces more ATP per glucose than anaerobic pathways

Question 19

Which of the following steps in cellular respiration produces the most NADH per glucose molecule?

Accepted Answer

Citric acid cycle

Question 20

Which of the following best describes substrate-level phosphorylation?

Accepted Answer

Direct transfer of a phosphate group to ADP from a phosphorylated intermediate

ch 9 prt 1

Study Guide - Practice Questions