Question 1

Which of the following best describes the nutritional adaptations of fungi compared to bacteria?

Accepted Answer

Fungi require less nitrogen than bacteria and can grow in high sugar and salt concentrations.

Question 2

A patient presents with a deep tissue fungal infection after a bone marrow transplant. Which type of mycosis is most likely involved?

Accepted Answer

Systemic mycosis

Question 3

Which of the following statements about yeast reproduction is correct?

Accepted Answer

Budding yeasts divide unevenly, while fission yeasts divide evenly.

Question 4

Which of the following fungi is used industrially to produce citric acid?

Accepted Answer

Aspergillus niger

Question 5

A patient develops neurological symptoms after eating shellfish. Which algal toxin is most likely responsible?

Accepted Answer

Domoic acid from diatoms

Question 6

Which of the following best explains why algal blooms can be harmful to aquatic environments?

Accepted Answer

Algal blooms can release toxins and, when they die, consume oxygen, leading to fish kills.

Question 7

Which of the following protozoan groups is characterized by movement using pseudopods?

Accepted Answer

Amebae

Question 8

A patient presents with dysentery after traveling to a region with poor sanitation. Which protozoan is most likely responsible?

Accepted Answer

Balantidium coli

Question 9

Which of the following statements about the life cycle of Plasmodium (malaria parasite) is correct?

Accepted Answer

Sporozoites are injected by the mosquito and undergo schizogony in the liver.

Question 10

Which of the following is a distinguishing feature of Microsporidia compared to other fungi?

Accepted Answer

They are obligate intracellular parasites and lack mitochondria.

Question 11

A patient is diagnosed with a tapeworm infection after eating undercooked pork. Which structure allows the tapeworm to attach to the intestinal wall?

Accepted Answer

Scolex

Question 12

Which of the following best describes the difference between a definitive host and an intermediate host in helminth life cycles?

Accepted Answer

The definitive host supports the adult or sexually reproductive form, while the intermediate host supports the immature or nonreproductive forms.

Question 13

Which nematode is commonly known as the pinworm and is diagnosed by finding eggs around the perianal region?

Accepted Answer

Enterobius vermicularis

Question 14

Which of the following is a correct statement about the economic uses of fungi?

Accepted Answer

Aspergillus terreus is used to produce statins that inhibit cholesterol synthesis.

Question 15

Which of the following is a characteristic of Oomycota (water molds) that distinguishes them from true fungi?

Accepted Answer

They have cellulose in their cell walls.

Question 16

A patient presents with a corneal infection after swimming in a lake. Which protozoan is most likely responsible for this infection?

Accepted Answer

Acanthamoeba

Question 17

Which of the following best describes the reproductive system of monoecious helminths?

Accepted Answer

Each individual contains both male and female reproductive organs.

Question 18

Which of the following is a correct statement about dinoflagellates?

Accepted Answer

They have cellulose in their plasma membrane and can produce neurotoxins.

Question 19

Which of the following equations best represents the process of photosynthetic carbon fixation by algae?

Accepted Answer

$$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6$ + 6O_2$$

Question 20

A patient is diagnosed with heartworm, a disease caused by a nematode transmitted by mosquitoes. Which nematode is responsible?

Accepted Answer

Dirofilaria immitis

Eukaryotic Microorganisms: Fungi, Algae, Protozoa, and Helminths

Study Guide - Practice Questions