$$\text{Parent cell} \rightarrow 2 \times \text{Daughter cells}$$

$$\text{Trophozoite} \rightarrow 2 \times \text{Trophozoites}$$

Question 1

Which of the following is a distinguishing feature of eukaryotic microbes compared to prokaryotic microbes?

Accepted Answer

DNA enclosed within a nucleus

Question 2

Microscopic algae play a crucial role in Earth's ecology by:

Accepted Answer

Producing much of Earth's oxygen

Question 3

Which of the following eukaryotic microbes is commonly used in biotechnology for bread and alcohol production?

Accepted Answer

Yeast

Question 4

A patient presents with severe diarrhea, malabsorption, and weight loss after swimming in a lake. Which organism is most likely responsible?

Accepted Answer

Giardia duodenalis

Question 5

Giardia trophozoites attach to the intestinal mucosa using which specialized structure?

Accepted Answer

Ventral disc

Question 6

Which of the following statements about the life cycle of Giardia is correct?

Accepted Answer

Trophozoites multiply by longitudinal binary fission in the small intestine

Question 7

Which diagnostic method is most sensitive for detecting Giardia infection?

Accepted Answer

Stool antigen detection assays or nucleic acid amplification tests (NAAT)

Question 8

Metronidazole is the first-line treatment for giardiasis. Why should it be used with caution in pregnant women?

Accepted Answer

It is associated with risk of cleft lip in the fetus

Question 9

Which of the following is a direct parasitic agent that infects humans?

Accepted Answer

Tapeworm

Question 10

Aedes aegypti is the primary vector for which viral disease?

Accepted Answer

Zika virus

Question 11

Which of the following equations best represents the process of mitosis in eukaryotic microbes?

Accepted Answer

$$	ext{Parent cell} ightarrow 2 	imes 	ext{Daughter cells}$$

Question 12

Which of the following is NOT a mode of Zika virus transmission?

Accepted Answer

Fecal-oral route

Question 13

The sylvatic cycle of Zika virus involves transmission between:

Accepted Answer

Non-human primates and forest mosquitoes

Question 14

Which of the following best describes the pathology of giardiasis?

Accepted Answer

Disruption of small intestine epithelial cell junctions and brush border enzymes

Question 15

Which of the following is a plausible reason why microscopy may fail to detect Giardia in stool samples?

Accepted Answer

Giardia is intermittently shed

Question 16

Which of the following is a mechanical vector for disease transmission?

Accepted Answer

Housefly

Question 17

Which of the following equations represents the multiplication of Giardia trophozoites in the small intestine?

Accepted Answer

$$	ext{Trophozoite} ightarrow 2 	imes 	ext{Trophozoites}$$

Question 18

Which of the following is a plausible distractor for the main mosquito vector of Zika virus?

Accepted Answer

Aedes aegypti

Question 19

Which of the following diseases is caused by a kinetoplastid protozoan transmitted by an insect vector?

Accepted Answer

African sleeping sickness

Question 20

Which of the following is a plausible distractor for the family to which Zika virus belongs?

Accepted Answer

Flaviviridae

Eukaryotic Microbes and Invertebrate Infectious Agents: Structure, Function, and Disease

Study Guide - Practice Questions