Question 1

Which of the following statements best describes a microorganism?

Accepted Answer

An organism that is too small to be seen with the unaided eye.

Question 2

Which of the following is NOT a benefit provided by microorganisms?

Accepted Answer

Causing all human diseases.

Question 3

Aseptic techniques in microbiology laboratories are primarily used to:

Accepted Answer

Prevent contamination in medicine and laboratory settings.

Question 4

Which of the following types of microorganisms is NOT always considered a living organism?

Accepted Answer

Viruses

Question 5

Which cell wall component is unique to bacteria and absent in archaea?

Accepted Answer

Peptidoglycan

Question 6

Which equation best represents the exponential growth of bacteria by binary fission?

Accepted Answer

$$N = N_0$ 	imes 2^n$$

Question 7

Which of the following is a characteristic of archaea that distinguishes them from bacteria?

Accepted Answer

Archaea are often found in extreme environments.

Question 8

Which group of microorganisms is divided into methanogens, extreme halophiles, and extreme thermophiles?

Accepted Answer

Archaea

Question 9

Which of the following is TRUE about fungi?

Accepted Answer

Fungi absorb organic material from their environment.

Question 10

Protozoa move by all of the following EXCEPT:

Accepted Answer

Hyphae

Question 11

Which of the following is a real-world application of microbes in industry?

Accepted Answer

Production of insulin for diabetes treatment.

Question 12

Which of the following statements about drug resistance is most accurate?

Accepted Answer

Drug resistance occurs when microorganisms become less susceptible to antibiotics.

Question 13

Which of the following shapes is NOT commonly found in bacteria?

Accepted Answer

Cuboidal (cube-shaped)

Question 14

Which of the following is a defining feature of eukaryotic cells?

Accepted Answer

Presence of a nuclear membrane.

Question 15

Which of the following microorganisms can be unicellular or multicellular?

Accepted Answer

Fungi

Question 16

Which of the following is NOT a function of microbes in our lives?

Accepted Answer

Destruction of all food sources.

Question 17

Which of the following is TRUE about the cell wall of fungi?

Accepted Answer

It is composed of chitin.

Question 18

Which of the following microorganisms is NOT pathogenic to humans?

Accepted Answer

Archaea

Question 19

Which of the following is a reason for developing aseptic techniques in medicine?

Accepted Answer

To prevent contamination and infection.

Question 20

Which of the following is a correct statement about protozoa?

Accepted Answer

Protozoa ingest or absorb organic material from their environment.

Introduction to Microbiology: The Microbial World and You

Study Guide - Practice Questions