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

Question 1

Which of the following best describes an amphibolic pathway?

Accepted Answer

A pathway that can be used for both breaking down and building substances.

Question 2

Which of the following statements about ATP is correct?

Accepted Answer

ATP provides energy for anabolic reactions and is made by catabolic reactions.

Question 3

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

Accepted Answer

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

Question 4

Which of the following is NOT a function of enzymes?

Accepted Answer

Being consumed or permanently changed by the reaction.

Question 5

Apoenzyme refers to:

Accepted Answer

An enzyme lacking its cofactor, in the inactive form.

Question 6

Which of the following best explains why high temperatures can reduce enzyme activity?

Accepted Answer

High temperatures cause enzymes to become denatured, altering their structure.

Question 7

Which of the following is an example of a coenzyme that acts as an electron carrier?

Accepted Answer

Nicotinamide adenine dinucleotide (NAD+)

Question 8

Which of the following statements about redox reactions is correct?

Accepted Answer

Oxidation is the loss of electrons, and reduction is the gain of electrons.

Question 9

During aerobic cellular respiration, what is the final electron acceptor in the electron transport chain?

Accepted Answer

Oxygen ($$\mathrm{O}_2)$$

Question 10

Which of the following is a correct summary of the products of glycolysis per molecule of glucose?

Accepted Answer

2 ATP, 2 NADH, 2 pyruvic acid

Question 11

Which of the following processes does NOT generate ATP?

Accepted Answer

All of the above generate ATP.

Question 12

Which of the following best describes the main goal of fermentation in microbial metabolism?

Accepted Answer

To regenerate NAD+ so glycolysis can continue.

Question 13

Which of the following best describes the fate of fatty acids during lipid catabolism?

Accepted Answer

They are broken down by beta-oxidation into acetyl-CoA, which enters the Krebs cycle.

Question 14

Which of the following best describes a chemolithoautotroph?

Accepted Answer

An organism that uses inorganic compounds for energy and fixes carbon from CO2.

Question 15

Which of the following is a correct sequence of events in the electron transport chain?

Accepted Answer

II → IV → I → III

Question 16

Which of the following is NOT a correct match between a biochemical test and its description?

Accepted Answer

Oxidase and catalase tests: Identifies the presence of enzymes related to anaerobic respiratory chains

Question 17

Which of the following is a product of mixed acid fermentation?

Accepted Answer

Ethanol, lactic acid, formic acid, acetic acid, succinic acid, and gases

Question 18

Which of the following is required for gluconeogenesis?

Accepted Answer

ATP and reducing power (e.g., NADPH)

Question 19

Which of the following is true about the pentose phosphate pathway?

Accepted Answer

It produces NADPH and converts pentoses into intermediates for glycolysis.

Question 20

Which of the following best describes the role of feedback inhibition in metabolic pathways?

Accepted Answer

It slows down or turns off a pathway when the end product accumulates.

Microbial Metabolism: Structured Study Notes for College Microbiology

Study Guide - Practice Questions