Question 1

Which of the following prokaryotic morphologies is correctly matched with its description?

Accepted Answer

Vibrio – slightly curved rod

Question 2

Which of the following statements about endospores is TRUE?

Accepted Answer

Endospores are stable resting stages that form under unfavorable conditions.

Question 3

Which two genera of Gram-positive bacteria are known for producing endospores?

Accepted Answer

Bacillus and Clostridium

Question 4

What is the most common method of asexual reproduction in prokaryotes?

Accepted Answer

Binary fission

Question 5

Which of the following best explains the arrangement of prokaryotic cells after binary fission?

Accepted Answer

The arrangement depends on the planes in which cells divide and whether daughter cells remain attached.

Question 6

Which of the following is NOT a difference between archaea and bacteria?

Accepted Answer

Archaea are known to cause many human diseases.

Question 7

Which of the following statements about cyanobacteria is FALSE?

Accepted Answer

Cyanobacteria lack peptidoglycan in their cell walls.

Question 8

Which of the following low G+C Gram-positive bacteria is associated with pneumonia and urinary tract infections due to its lack of a cell wall?

Accepted Answer

Mycoplasma

Question 9

Which high G+C Gram-positive genus is known for its slow growth due to mycolic acid in its cell wall and is the causative agent of tuberculosis?

Accepted Answer

Mycobacterium

Question 10

Which class of Proteobacteria includes the genus Rickettsia, which causes typhus and Rocky Mountain spotted fever?

Accepted Answer

Alphaproteobacteria

Question 11

Which of the following statements about viruses is TRUE?

Accepted Answer

Viruses are acellular infectious agents that require host cells for replication.

Question 12

What is the correct order of stages in the lytic replication cycle of a bacteriophage?

Accepted Answer

Attachment, entry, synthesis, assembly, release

Question 13

Which type of viral RNA can be directly translated by host ribosomes?

Accepted Answer

Positive-sense RNA (+ssRNA)

Question 14

Which of the following is a characteristic of prions?

Accepted Answer

They are proteinaceous infectious agents lacking nucleic acid.

Question 15

Which of the following best describes the process of lysogeny in bacteriophages?

Accepted Answer

The viral genome integrates into the host chromosome and remains inactive for generations.

Question 16

Which of the following statements about fungal morphology is TRUE?

Accepted Answer

Molds are composed of long filaments called hyphae.

Question 17

Which of the following is a function of lichens in the environment?

Accepted Answer

They create soil from weathered rocks.

Question 18

Which of the following is a distinguishing feature of protozoan cysts?

Accepted Answer

They allow protozoa to survive harsh environmental conditions.

Question 19

Which of the following statements about arthropod vectors is correct?

Accepted Answer

Insects have three pairs of legs and include mosquitoes, which are major disease vectors.

Question 20

Which of the following is a correct statement about viroids?

Accepted Answer

Viroids are similar to RNA viruses but lack a capsid and infect plants.

Microbiology Exam 2 Review: Prokaryotes, Eukaryotes, Viruses, Viroids, and Prions

Study Guide - Practice Questions