Question 1

Which of the following best defines a microbe?

Accepted Answer

Any organism that is too small to be seen without a microscope.

Question 2

Which of the following is NOT considered a microbe?

Accepted Answer

Earthworm

Question 3

Which of the following statements about viruses is correct?

Accepted Answer

Viruses are non-living and require a host cell to replicate.

Question 4

Which of the following is a eukaryotic microorganism?

Accepted Answer

Fungi

Question 5

Which of the following is a correct example of a prokaryote?

Accepted Answer

Bacillus subtilis

Question 6

Which of the following best describes the difference between bacteria and archaea?

Accepted Answer

Archaea have unique membrane lipids and can survive in extreme environments.

Question 7

Which of the following is NOT a method to differentiate viruses?

Accepted Answer

Ability to photosynthesize

Question 8

Which of the following is a correct statement about the size of microbes?

Accepted Answer

Viruses are generally smaller than bacteria.

Question 9

Which of the following is a characteristic of eukaryotic cells but NOT prokaryotic cells?

Accepted Answer

Presence of membrane-bound organelles

Question 10

Which of the following best describes the function of the bacterial cell wall?

Accepted Answer

It provides structural support and protection.

Question 11

A patient presents with a fever and cough. Laboratory analysis reveals the presence of a microbe with a peptidoglycan cell wall, no nucleus, and a size of approximately $$1 \ \mu m. $$Which type of organism is most likely responsible?

Accepted Answer

Bacterium

Question 12

Which of the following is NOT a characteristic used to classify bacteria?

Accepted Answer

Type of nucleic acid (DNA or RNA)

Question 13

Which of the following statements about microbial diversity is correct?

Accepted Answer

Microbes can be found in almost every environment on Earth.

Question 14

Which of the following is a correct pairing of microbe and disease?

Accepted Answer

Virus – HIV/AIDS

Question 15

Which of the following best explains why viruses are not classified as living organisms?

Accepted Answer

They lack cellular structure and cannot reproduce independently.

Question 16

Which of the following is a correct statement about the Gram stain?

Accepted Answer

It distinguishes bacteria based on differences in their cell wall structure.

Question 17

A scientist isolates a microbe from a hot spring with a temperature of $$90^\circ C. $$The microbe lacks a nucleus and has unique membrane lipids. Which group does this organism most likely belong to?

Accepted Answer

Archaea

Question 18

Which of the following is NOT a function of microbial metabolism?

Accepted Answer

Formation of the nuclear envelope

Question 19

Which of the following best describes the role of microbes in the environment?

Accepted Answer

They play essential roles in nutrient cycling and decomposition.

Question 20

A hospital outbreak is traced to a microbe that is unicellular, eukaryotic, and reproduces by budding. Which of the following is the most likely causative agent?

Accepted Answer

Yeast

Microbial Diversity and Classification: Study Notes (Lecture 5)

Study Guide - Practice Questions

Study Guide - Flashcards