Question 1

Which of the following statements best describes the difference between Bacteria and Archaea cell walls?

Accepted Answer

Bacteria have cell walls made of peptidoglycan, while Archaea have cell walls made of pseudopeptidoglycan.

Question 2

Which of the following is NOT a characteristic of fungi?

Accepted Answer

They are always unicellular.

Question 3

A patient presents with severe diarrhea after drinking untreated water from a mountain stream. Which protozoan is most likely responsible?

Accepted Answer

Giardia lamblia

Question 4

Which of the following best describes the Gram-positive bacterial cell wall?

Accepted Answer

Thick peptidoglycan layer and stains purple with Gram stain.

Question 5

Which of the following groups of fungi is responsible for producing aflatoxin, a potent carcinogen found on peanuts and grains?

Accepted Answer

Ascomycetes (Aspergillus species)

Question 6

Which of the following is a distinguishing feature of the domain Eukarya compared to Bacteria and Archaea?

Accepted Answer

Presence of membrane-bound organelles

Question 7

Which of the following best describes the metabolic diversity of Bacteria?

Accepted Answer

They can be heterotrophic or autotrophic, with some using chlorophyll for photosynthesis.

Question 8

Which of the following is true regarding the binomial nomenclature system established by Carolus Linnaeus?

Accepted Answer

The genus name is capitalized and the species name is lowercase, both are underlined.

Question 9

Which of the following is NOT a typical shape observed in bacteria?

Accepted Answer

Cuboidal

Question 10

Which of the following statements about Archaea is correct?

Accepted Answer

They have never been shown to cause disease in humans.

Question 11

Which of the following best describes the role of mycorrhizae in ecosystems?

Accepted Answer

They form symbiotic relationships with plant roots, aiding in nutrient absorption.

Question 12

Which of the following is a unique feature of the Apicomplexan group of protozoa?

Accepted Answer

They are non-motile and cause diseases such as malaria and toxoplasmosis.

Question 13

Which of the following best explains why less than 1% of bacteria are considered pathogenic?

Accepted Answer

Most bacteria play beneficial roles in the environment or are harmless.

Question 14

Which of the following is a correct pairing of a protist group and a disease it causes?

Accepted Answer

Kinetoplastids – African Sleeping Sickness

Question 15

Which of the following is a distinguishing feature of the acid-fast bacterial cell wall?

Accepted Answer

Presence of mycolic acid in the cell wall

Question 16

Which of the following best describes the reproduction of yeast?

Accepted Answer

Yeasts typically reproduce asexually via budding.

Question 17

Which of the following is a correct statement about the metabolic strategies of Archaea?

Accepted Answer

Some Archaea are autotrophic and use bacteriorhodopsin for energy.

Question 18

Which of the following is a medically significant member of the Zygomycetes group?

Accepted Answer

Rhizopus, which can cause disease in patients with diabetes or leukemia.

Question 19

Which of the following best describes the function of chloroplasts in algae?

Accepted Answer

They enable algae to perform photosynthesis and produce organic compounds from sunlight.

Question 20

Which of the following is a correct statement about the diversity of Archaea?

Accepted Answer

Crenarchaeota are mostly hyperthermophiles, while Euryarchaeota include halophiles and methanogens.

Major Groups of Prokaryotic and Eukaryotic Microorganisms: Classification, Structure, and Diversity

Study Guide - Practice Questions