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

Question 1

Which of the following best describes the overall purpose of cellular respiration in eukaryotic cells?

Accepted Answer

To break down glucose and other macromolecules to produce ATP for cellular work

Question 2

During glycolysis, glucose is converted into pyruvate. What is the net gain of ATP and NADH per molecule of glucose?

Accepted Answer

$$2$$ ATP and $$2$$ NADH

Question 3

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

Accepted Answer

O$$_2$$

Question 4

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

Accepted Answer

Oxidative phosphorylation

Question 5

Which equation correctly represents the overall reaction of aerobic cellular respiration?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$} ightarrow 6\mathrm{CO_2$} + 6\mathrm{H_2O} + 	ext{energy (ATP + heat)}$$

Question 6

Which process produces the most ATP per molecule of glucose during cellular respiration?

Accepted Answer

Electron Transport Chain and Chemiosmosis

Question 7

A patient is exposed to cyanide, which blocks the electron transport chain. What immediate effect does this have on cellular respiration?

Accepted Answer

ATP production via oxidative phosphorylation stops

Question 8

Which of the following is TRUE about substrate-level phosphorylation?

Accepted Answer

It directly transfers a phosphate group from a substrate to ADP to form ATP

Question 9

During fermentation, which molecule is regenerated to allow glycolysis to continue?

Accepted Answer

NAD+

Question 10

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

Accepted Answer

Fats have more reduced carbon, allowing more electrons to be donated to the electron transport chain

Question 11

Which step in cellular respiration produces CO$$_2 as a $$waste product?

Accepted Answer

Citric Acid Cycle

Question 12

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

Accepted Answer

Glycolysis coupled with fermentation

Question 13

Which of the following is a direct product of the electron transport chain?

Accepted Answer

Water ($$\mathrm{H_2O})$$

Question 14

Which molecule is oxidized during glycolysis?

Accepted Answer

Glucose

Question 15

A mutation prevents NAD+ from being reduced to NADH. Which process would be most directly affected?

Accepted Answer

Glycolysis and Citric Acid Cycle

Question 16

Which of the following best describes chemiosmosis?

Accepted Answer

The synthesis of ATP using the energy of a proton gradient across a membrane

Question 17

Which of the following is NOT a product of the Citric Acid Cycle?

Accepted Answer

O$$_2$$

Question 18

If the proton gradient across the inner mitochondrial membrane is dissipated, what will happen to ATP synthesis?

Accepted Answer

ATP synthesis will stop

Question 19

Which of the following statements about NAD+ and FAD is correct?

Accepted Answer

NAD+ is reduced to NADH during glycolysis and the Citric Acid Cycle, while FAD is reduced to FADH$$_2$$ only in the Citric Acid Cycle

Question 20

A patient’s mitochondria are unable to maintain a proton gradient. Which of the following would you expect to be true?

Accepted Answer

The patient’s cells will rely more on glycolysis and fermentation for ATP production

Energy & Enzymes: Cellular Respiration and Metabolism (Chapter 7 Study Guide)

Study Guide - Practice Questions