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

Question 1

After eating a sandwich, which process is responsible for breaking down starch into maltose in your mouth?

Accepted Answer

Hydrolysis by salivary amylase

Question 2

Which equation correctly represents the overall reaction for cellular respiration?

Accepted Answer

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

Question 3

During glycolysis, glucose is split into two molecules of which compound?

Accepted Answer

Pyruvate

Question 4

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

Accepted Answer

Oxygen ($$\mathrm{O_2$})$$

Question 5

What is the main purpose of chemiosmosis in cellular respiration?

Accepted Answer

To generate ATP by allowing $$\mathrm{H^+} to $$diffuse through ATP synthase

Question 6

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

Accepted Answer

Potential energy in glucose is converted to ATP and heat

Question 7

In the context of cellular respiration, what does the term 'oxidation' refer to?

Accepted Answer

Loss of electrons from a molecule

Question 8

Which process occurs immediately after glycolysis and before the citric acid cycle?

Accepted Answer

Pyruvate oxidation

Question 9

Why is ATP considered an unstable molecule?

Accepted Answer

Because of the cluster of negative charges in its phosphate groups

Question 10

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

Accepted Answer

Carbon dioxide ($$\mathrm{CO_2$})$$

Question 11

A lion eats meat, which is digested and absorbed as amino acids. Which cellular process will these amino acids most likely enter to release energy?

Accepted Answer

Cellular respiration

Question 12

Which step in cellular respiration is responsible for the majority of ATP production?

Accepted Answer

Oxidative phosphorylation

Question 13

If a cell lacks oxygen, which process will it use to generate ATP?

Accepted Answer

Fermentation

Question 14

Which of the following best explains why glucose has higher potential energy than CO2?

Accepted Answer

Glucose contains many weak C-H bonds, while CO2 contains strong C-O bonds

Question 15

During the electron transport chain, what is the role of NADH and FADH2?

Accepted Answer

They donate electrons to the chain, enabling ATP production

Question 16

Which of the following is NOT a product of cellular respiration?

Accepted Answer

Oxygen ($$\mathrm{O_2$})$$

Question 17

What is the significance of the concentration gradient of $$\mathrm{H^+}$$ across the mitochondrial membrane?

Accepted Answer

It drives ATP synthesis via ATP synthase

Question 18

Which process is described as the diffusion of $$\mathrm{H^+}$$ ions down ATP synthase?

Accepted Answer

Chemiosmosis

Question 19

A person eats pasta, which is digested into glucose. Which hormone is responsible for signaling cells to take up glucose from the bloodstream?

Accepted Answer

Insulin

Question 20

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

Accepted Answer

Photosynthesis produces glucose and oxygen, which are used as reactants in cellular respiration

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

Study Guide - Practice Questions