Question 1

Which of the following structures is present in eukaryotic cells but absent in prokaryotic cells?

Accepted Answer

Mitochondria

Question 2

A patient presents with ringworm, a common skin infection. Which of the following statements about the causative organism is correct?

Accepted Answer

It is a eukaryotic fungus that reproduces via reproductive spores.

Question 3

Which of the following best describes the main structural difference between bacterial endospores and fungal spores?

Accepted Answer

Bacterial endospores are for survival under harsh conditions, while fungal spores are primarily for reproduction.

Question 4

Which of the following diseases is caused by a protozoan and is transmitted by mosquitoes?

Accepted Answer

Malaria

Question 5

A Gram-positive rod-shaped bacterium is observed under a microscope. Which of the following features is it most likely to possess?

Accepted Answer

Peptidoglycan-rich cell wall and possibly endospores

Question 6

Which of the following statements about viruses is correct?

Accepted Answer

Viruses can have either DNA or RNA as genetic material, but lack a true cellular structure.

Question 7

Which of the following is a correct comparison between the mitochondria of eukaryotic cells and prokaryotic cells?

Accepted Answer

Only eukaryotic cells contain mitochondria; prokaryotes generate ATP at the plasma membrane.

Question 8

A patient is diagnosed with candidiasis. Which of the following statements about the causative organism is correct?

Accepted Answer

It is a eukaryotic fungus that can form reproductive spores.

Question 9

Which of the following best explains why protozoans are often successful in moist environments?

Accepted Answer

Their motility structures, such as flagella and cilia, function best in aqueous environments.

Question 10

Which of the following is true regarding the classification of helminths?

Accepted Answer

They are multicellular eukaryotic parasites, including nematodes, trematodes, and cestodes.

Question 11

A laboratory technician is using a light microscope to observe a microorganism approximately 20 micrometers in size. Which of the following is the organism most likely to be?

Accepted Answer

A protozoan

Question 12

Which of the following statements about peptidoglycan is correct?

Accepted Answer

It is found in the cell walls of bacteria, providing structural support.

Question 13

Which of the following diseases is caused by a helminth and is commonly diagnosed by finding eggs in the perianal region?

Accepted Answer

Pinworm infection (Enterobius vermicularis)

Question 14

Which of the following best describes the function of ribosomes in both prokaryotic and eukaryotic cells?

Accepted Answer

Protein synthesis

Question 15

A patient is diagnosed with botulism. Which of the following statements is correct regarding the causative agent?

Accepted Answer

It is a Gram-positive, endospore-forming bacterium.

Question 16

Which of the following is a key difference between the cellular structure of fungi and bacteria?

Accepted Answer

Fungi have chitin in their cell walls, while bacteria have peptidoglycan.

Question 17

Which of the following best describes the trophozoite stage of a protozoan?

Accepted Answer

It is the active, feeding, and motile stage.

Question 18

Which of the following diseases is NOT caused by a eukaryotic organism?

Accepted Answer

Strep throat

Question 19

Which of the following statements about motility in eukaryotes is correct?

Accepted Answer

Eukaryotic flagella are composed of microtubules arranged in a 9+2 pattern.

Question 20

A patient presents with symptoms of meningitis. Which of the following could be a possible causative agent?

Accepted Answer

Bacteria, fungi, or viruses

Prokaryotes, Eukaryotes, and Microbial Diversity: Comparative Review

Study Guide - Practice Questions

Study Guide - Flashcards