Question 1

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

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O + ATP$$

Question 2

During glycolysis, what is the net gain of ATP and NADH per molecule of glucose?

Accepted Answer

2 ATP and 2 NADH

Question 3

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

Accepted Answer

Glycolysis

Question 4

What is the main function of NAD$$^+ in $$cellular respiration?

Accepted Answer

Transfers electrons to the electron transport chain

Question 5

Which of the following is produced during pyruvate oxidation?

Accepted Answer

Acetyl CoA, NADH, and CO$$_2$$

Question 6

Where does the citric acid cycle occur within the mitochondrion?

Accepted Answer

Matrix

Question 7

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

Accepted Answer

O$$_2$$

Question 8

What is the role of the proton (H$$^+) $$gradient in oxidative phosphorylation?

Accepted Answer

It drives ATP synthesis via ATP synthase

Question 9

Which of the following statements about fermentation is TRUE?

Accepted Answer

Fermentation regenerates NAD$$^+ to $$keep glycolysis running

Question 10

In lactic acid fermentation, what is the end product formed from pyruvate?

Accepted Answer

Lactate

Question 11

Which of the following best describes substrate-level phosphorylation?

Accepted Answer

An enzyme transfers a phosphate group directly from a substrate to ADP

Question 12

Which stage of cellular respiration produces the most ATP?

Accepted Answer

Oxidative phosphorylation

Question 13

What is the main purpose of the electron transport chain in cellular respiration?

Accepted Answer

To transfer electrons to O$$_2$$ and create a proton gradient

Question 14

Which of the following is a correct summary of the products of the citric acid cycle per glucose molecule?

Accepted Answer

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

Question 15

Which of the following is NOT a function of ATP in the cell?

Accepted Answer

Storing genetic information

Question 16

Which of the following best explains why obligate anaerobes cannot survive in the presence of oxygen?

Accepted Answer

Oxygen is toxic to their metabolic pathways

Question 17

During oxidative phosphorylation, what is the immediate source of energy used by ATP synthase to produce ATP?

Accepted Answer

Flow of protons (H$$^+) $$down their gradient

Question 18

Which of the following is a real-world application of fermentation?

Accepted Answer

Brewing beer and making yogurt

Question 19

If a cell is deprived of oxygen, which process will continue to generate ATP?

Accepted Answer

Glycolysis coupled with fermentation

Question 20

Which of the following best describes the relationship between photosynthesis and cellular respiration in the ecosystem?

Accepted Answer

Photosynthesis produces organic molecules and O$$_2$$, which are used in cellular respiration to generate ATP

Chapter 7: Cellular Respiration – Mechanisms and Pathways

Study Guide - Practice Questions