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

Question 1

Which of the following best describes the role of microbes in the environment, aside from causing disease?

Accepted Answer

They participate in nutrient cycling, such as nitrogen fixation and decomposition.

Question 2

Which of the following is the correct way to write a scientific name according to binomial nomenclature?

Accepted Answer

Escherichia coli

Question 3

Which of the following statements about the three domains of life is correct?

Accepted Answer

Archaea are more closely related to Eukarya than to Bacteria.

Question 4

Which external bacterial structure is primarily responsible for attachment to surfaces and formation of biofilms?

Accepted Answer

Fimbriae

Question 5

Penicillin targets bacterial cell walls by inhibiting the synthesis of which component?

Accepted Answer

Peptidoglycan

Question 6

Which equation correctly represents the hydrolysis of ATP to ADP?

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 hand washing took so long to be implemented in medical settings?

Accepted Answer

There was a lack of scientific evidence supporting the existence of microbes.

Question 8

Which bacterial cell envelope component is unique to Gram-negative bacteria and can trigger strong immune responses in humans?

Accepted Answer

Lipid A (part of LPS)

Question 9

Which of the following is a major limitation of Koch’s postulates when applied to modern infectious diseases?

Accepted Answer

They cannot be used for diseases caused by viruses that require host cells for growth.

Question 10

Which process allows bacteria to acquire new genetic material from the environment, and is used in biotechnology to produce recombinant insulin?

Accepted Answer

Transformation

Question 11

A bacterial cell is placed in an environment with a pH of 3. Which of the following is most likely to occur?

Accepted Answer

The cell will increase production of acid-resistant proteins.

Question 12

Which of the following best describes the difference between prokaryotes and eukaryotes?

Accepted Answer

Eukaryotes have a nucleus, prokaryotes do not.

Question 13

Which of the following is a reason why endospores are concerning in medical and food settings?

Accepted Answer

Endospores can survive harsh conditions and resist disinfectants.

Question 14

During aerobic cellular respiration in bacteria, where does the electron transport chain occur?

Accepted Answer

In the cell membrane

Question 15

Which of the following best describes the process of binary fission?

Accepted Answer

A bacterial cell divides into two identical daughter cells.

Question 16

Which of the following is a mechanism by which bacteria can develop antibiotic resistance?

Accepted Answer

Producing enzymes that inactivate antibiotics

Question 17

Which of the following best explains why the flu shot changes every year?

Accepted Answer

Antigenic drift and shift cause changes in influenza virus spike proteins.

Question 18

Which of the following is a property of biofilms that makes them difficult to treat in human infections?

Accepted Answer

Biofilms allow bacteria to communicate and resist antibiotics through emergent properties.

Question 19

Which of the following best describes the process of horizontal gene transfer via conjugation?

Accepted Answer

A donor cell transfers DNA to a recipient cell through a sex pilus.

Question 20

A bacterial population is in the stationary phase of the growth curve. Which of the following best explains what is happening?

Accepted Answer

Cell division and cell death rates are equal due to limited nutrients and accumulation of waste.

Comprehensive Study Guide: Foundations of Microbiology

Study Guide - Practice Questions