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

$$\mathrm{ATP} \rightarrow \mathrm{ADP} + \mathrm{Pi} + \text{energy}$$

Question 1

Which of the following best describes the difference between linear and cyclic metabolic pathways?

Accepted Answer

In linear pathways, the product of one reaction becomes the substrate for the next, while in cyclic pathways, the substrate enters and the cycle repeats with the same basic chemicals.

Question 2

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

Accepted Answer

Assembly of proteins from amino acids

Question 3

What is the primary role of coenzymes such as NAD+ and FADH in cellular respiration?

Accepted Answer

They assist enzymes by transferring electrons and hydrogen ions during metabolic reactions.

Question 4

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

Accepted Answer

$$2$$

Question 5

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

Accepted Answer

$$\mathrm{ATP} ightarrow \mathrm{ADP} + \mathrm{Pi} + 	ext{energy}$$

Question 6

If oxygen is not present in a cell, what happens to the pyruvate produced during glycolysis?

Accepted Answer

It cannot enter the mitochondria and is instead used in fermentation pathways.

Question 7

Which step of cellular respiration occurs in the cytoplasm of the cell?

Accepted Answer

Glycolysis

Question 8

During the preparatory step of cellular respiration, what are the products formed from one molecule of pyruvate?

Accepted Answer

Acetyl group, NADH, and carbon dioxide

Question 9

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

Accepted Answer

Enzymes can be reused multiple times in metabolic reactions.

Question 10

A patient is unable to produce NAD+. Which stage of cellular respiration would be directly affected first?

Accepted Answer

Glycolysis

Question 11

Which of the following best explains why ATP is considered the 'energy currency' of the cell?

Accepted Answer

ATP stores energy in its phosphate bonds, which can be released to do cellular work.

Question 12

Which of the following is a waste product of the preparatory step in cellular respiration?

Accepted Answer

Carbon dioxide

Question 13

How many NADH molecules are produced during glycolysis from one molecule of glucose?

Accepted Answer

$$2$$

Question 14

Which of the following best describes substrate-level phosphorylation?

Accepted Answer

ATP is produced directly by transferring a phosphate group to ADP from a substrate molecule.

Question 15

Which molecule picks up the acetyl group during the preparatory step to form acetyl CoA?

Accepted Answer

Coenzyme A

Question 16

A mutation prevents the formation of coenzyme A in a cell. Which process would be directly impaired?

Accepted Answer

Conversion of pyruvate to acetyl CoA

Question 17

Which of the following statements about the catabolism of glucose is correct?

Accepted Answer

It is a catabolic process that releases energy.

Question 18

If a cell is deprived of glucose, which macromolecule will it most likely use next for ATP production?

Accepted Answer

Lipids

Question 19

Which of the following is true regarding the location of the steps of cellular respiration?

Accepted Answer

Glycolysis occurs in the cytoplasm, while the preparatory step, citric acid cycle, and electron transport system occur in the mitochondria.

Question 20

Which of the following best describes the fate of the hydrogen ions and electrons released during glycolysis?

Accepted Answer

They are picked up by NAD+ to form NADH.

Metabolic Pathways and Energy Production in Cells

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