Question 1

Which of the following best describes dimorphism in fungi?

Accepted Answer

The ability to exist as either a yeast or a mold depending on environmental conditions

Question 2

Which structure is responsible for the vegetative growth of molds?

Accepted Answer

Vegetative hyphae

Question 3

A patient presents with a fungal infection that is limited to the outermost layer of skin and hair. Which type of mycosis is this?

Accepted Answer

Superficial mycosis

Question 4

Which of the following is a key nutritional adaptation of fungi that allows them to thrive in diverse environments?

Accepted Answer

Ability to grow in hypertonic environments with high sugar or salt concentrations

Question 5

Which phylum of fungi is characterized by the production of zygospores during sexual reproduction?

Accepted Answer

Zygomycota

Question 6

Saccharomyces cerevisiae is economically important because it is used in:

Accepted Answer

Fermentation of bread and alcoholic beverages

Question 7

Which of the following best describes a lichen?

Accepted Answer

A symbiotic association between a fungus and an alga or cyanobacterium

Question 8

Which lichen morphology is characterized by a leaf-like appearance?

Accepted Answer

Foliose

Question 9

Diatoms can cause domoic acid toxicosis. Which of the following best explains the mechanism of this disease?

Accepted Answer

Domoic acid accumulates in shellfish, and when humans consume contaminated shellfish, it causes neurological symptoms.

Question 10

Which protozoan structure is involved in ingestion of food particles?

Accepted Answer

Cytosome

Question 11

In malaria, which host is considered the definitive host?

Accepted Answer

Mosquito

Question 12

Which of the following diseases is caused by a protozoan that forms cysts and is transmitted via contaminated water?

Accepted Answer

Giardiasis

Question 13

Which term describes a helminth species in which male and female reproductive organs are found in separate individuals?

Accepted Answer

Dioecious

Question 14

Which feature allows trematodes to evade host immune responses?

Accepted Answer

Ability to change surface antigens

Question 15

Humans can be either the definitive or intermediate host in cestode infections. Which scenario describes humans as the intermediate host?

Accepted Answer

Humans ingest eggs and larvae develop in tissues, causing cysticercosis.

Question 16

Which nematode is commonly known as the human whipworm?

Accepted Answer

Trichuris trichiura

Question 17

Vectors are organisms that transmit pathogens. Which of the following is an example of biological transmission?

Accepted Answer

A mosquito ingesting Plasmodium and transmitting it during a blood meal after the parasite develops inside the mosquito

Question 18

Which class of vectors includes ticks and mites?

Accepted Answer

Arachnidia

Question 19

A red tide is most commonly associated with which group of algae?

Accepted Answer

Dinoflagellates

Question 20

Which equation best represents the photosynthetic process in algae?

Accepted Answer

$$6\ \mathrm{CO}_2 + 6\ \mathrm{H}_2\mathrm{O} \rightarrow C_6H_{12}O_6$ + 6\ \mathrm{O}_2$$

Eukaryotes: Fungi, Algae, Protozoa, and Helminths

Study Guide - Practice Questions