Q: Which of the following equations correctly represents the overall reaction for cellular respiration?

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

Question 1

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

Accepted Answer

To break down glucose and other organic molecules to produce ATP

Question 2

During the process of glycolysis, what is the fate of glucose?

Accepted Answer

It is converted into two molecules of pyruvate

Question 3

Which of the following equations correctly represents the overall reaction for cellular respiration?

Accepted Answer

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

Question 4

In the electron transport chain, what is the final electron acceptor?

Accepted Answer

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

Question 5

Which process directly produces the most ATP during cellular respiration?

Accepted Answer

Oxidative phosphorylation (electron transport chain and chemiosmosis)

Question 6

What is the role of NAD+ in cellular respiration?

Accepted Answer

It acts as an electron carrier, accepting electrons during glycolysis and the Krebs cycle

Question 7

Which of the following best explains why the hydrolysis of ATP releases energy?

Accepted Answer

The phosphate groups in ATP are negatively charged and repel each other, making the bonds unstable

Question 8

A person eats a sandwich containing carbohydrates, proteins, and fats. Which of the following correctly describes the fate of the carbohydrates during digestion and cellular respiration?

Accepted Answer

Carbohydrates are digested into monosaccharides, absorbed into the bloodstream, and ultimately oxidized to produce ATP, CO2, and H2O

Question 9

Which of the following statements about chemiosmosis is correct?

Accepted Answer

Chemiosmosis is the diffusion of H+ ions down their concentration gradient through ATP synthase, resulting in ATP production

Question 10

Which of the following best describes the energy transformation that occurs during cellular respiration?

Accepted Answer

Chemical energy in glucose is converted to chemical energy in ATP, with some energy lost as heat

Question 11

Which of the following is a correct description of oxidative phosphorylation?

Accepted Answer

It is the process by which ATP is produced using energy released by the movement of electrons through the electron transport chain and the diffusion of H+ through ATP synthase

Question 12

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

Accepted Answer

ATP production during glycolysis

Question 13

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

Accepted Answer

Oxygen acts as the final electron acceptor in the electron transport chain, allowing the chain to continue functioning

Question 14

A mutation prevents the formation of ATP synthase in mitochondria. Which of the following would be the most immediate consequence?

Accepted Answer

The cell would be unable to generate ATP via chemiosmosis

Question 15

Which of the following best describes what happens to the electrons removed from glucose during cellular respiration?

Accepted Answer

They are transferred to oxygen, forming water

Question 16

Which of the following is a correct pairing of process and location in eukaryotic cells?

Accepted Answer

Electron transport chain – inner mitochondrial membrane

Question 17

If a person is unable to absorb glucose from the small intestine, which of the following would be the most direct consequence?

Accepted Answer

The person would be unable to produce ATP via cellular respiration

Question 18

Which of the following best explains why the breakdown of glucose is considered an exergonic reaction?

Accepted Answer

The products have lower potential energy than the reactants, and energy is released

Question 19

Which of the following is a waste product of cellular respiration that is exhaled from the body?

Accepted Answer

Carbon dioxide ($$	ext{CO}_2)$$

Question 20

Which of the following steps in cellular respiration is most directly associated with the production of water?

Accepted Answer

Electron transport chain

How Cells Harvest Chemical Energy: Cellular Respiration (Part I)

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