$$\mathrm{ATP} + \mathrm{H}_2\mathrm{O} \rightarrow \mathrm{ADP} + \mathrm{P}_i + \text{energy}$$

Question 1

Which of the following best describes the relationship between catabolism and anabolism in cellular metabolism?

Accepted Answer

Catabolism releases energy to drive anabolic reactions.

Question 2

Digesting a large protein into amino acids is an example of which metabolic process?

Accepted Answer

Catabolism, because it breaks down molecules to release energy.

Question 3

Which molecule acts as the primary energy currency in cells, coupling exergonic and endergonic reactions?

Accepted Answer

ATP

Question 4

A patient is recovering from a muscle injury. Which metabolic pathway is primarily responsible for rebuilding muscle tissue?

Accepted Answer

Anabolic pathway

Question 5

Which of the following is a direct result of ATP hydrolysis in a cell?

Accepted Answer

Release of energy for cellular work

Question 6

Which of the following equations correctly represents the hydrolysis of ATP?

Accepted Answer

$$\mathrm{ATP} + \mathrm{H}_2\mathrm{O} ightarrow \mathrm{ADP} + \mathrm{P}_i + 	ext{energy}$$

Question 7

Which of the following best explains why metabolic pathways are organized into chains and cycles?

Accepted Answer

To allow multiple points of regulation and access to intermediates

Question 8

A person’s Basal Metabolic Rate (BMR) is most accurately measured under which conditions?

Accepted Answer

At complete rest, not digesting food, in a controlled environment

Question 9

Which of the following factors does NOT directly affect the estimation of Basal Metabolic Rate (BMR)?

Accepted Answer

Blood type

Question 10

Which of the following scenarios best illustrates energy coupling in a cell?

Accepted Answer

ATP is hydrolyzed to power the synthesis of a protein from amino acids.

Question 11

Which of the following statements about enzymes in metabolic pathways is correct?

Accepted Answer

Enzymes allow for regulation and efficiency in metabolic pathways.

Question 12

If a cell could not regenerate ATP from ADP and $$P_i$$, which process would be most directly affected?

Accepted Answer

Active transport of ions across membranes

Question 13

Which of the following is an example of an anabolic reaction?

Accepted Answer

Synthesis of DNA from nucleotides

Question 14

A hummingbird has a much higher metabolic rate per gram than an elephant. Which of the following best explains this observation?

Accepted Answer

Smaller animals lose heat more rapidly and must generate more energy per gram.

Question 15

Which of the following best describes the role of ATP in muscle contraction after injury?

Accepted Answer

ATP provides energy for the synthesis of new muscle proteins.

Question 16

Which of the following is a correct statement about catabolic pathways?

Accepted Answer

They release energy by breaking down complex molecules.

Question 17

Which of the following best explains why enzymes lower the activation energy of metabolic reactions?

Accepted Answer

They provide an alternative reaction pathway with lower energy requirements.

Question 18

Which of the following is the best example of energy coupling in metabolism?

Accepted Answer

The energy released from ATP hydrolysis is used to drive the synthesis of macromolecules.

Question 19

Which of the following is NOT a benefit of organizing metabolic reactions into pathways?

Accepted Answer

Ensures all reactions occur simultaneously

Question 20

Which of the following best describes the process of recycling monomers into new structures in metabolism?

Accepted Answer

Catabolic reactions convert polymers to monomers, which are then used in anabolic reactions to build new polymers.

Metabolism: Catabolic and Anabolic Pathways in Human Physiology

Study Guide - Practice Questions