Question 1

Which of the following characteristics best distinguishes fungi from bacteria?

Accepted Answer

Fungi are eukaryotic and have cell walls containing glucans, mannans, and chitin, while bacteria are prokaryotic and have cell walls containing peptidoglycan.

Question 2

A patient presents with a fungal infection that is localized to the hair shaft. Which type of mycosis is most likely responsible?

Accepted Answer

Superficial mycosis

Question 3

Which adaptation allows fungi to thrive in environments with high osmotic pressure?

Accepted Answer

Resistance to high sugar and salt concentrations

Question 4

A dimorphic fungus is isolated from a patient. At 37°C, it appears yeast-like, but at 25°C, it forms hyphae. What is the significance of this observation?

Accepted Answer

The fungus can exist in two distinct morphological forms depending on temperature, which is often associated with pathogenicity.

Question 5

Which of the following is TRUE regarding fungal hyphae?

Accepted Answer

Aseptate (coenocytic) hyphae lack septa and consist of a long, multinucleate cell.

Question 6

Which type of fungal spore is produced by fragmentation of septate hyphae?

Accepted Answer

Arthroconidia

Question 7

During the sexual reproduction of fungi, which phase involves the fusion of haploid nuclei to form a diploid zygote?

Accepted Answer

Karyogamy

Question 8

A bread mold is found to produce sporangiospores asexually and zygospores sexually. To which phylum does it most likely belong?

Accepted Answer

Zygomycota (Mucoromycota)

Question 9

Which medically important fungus is known for producing a potent neurotoxin that can cause seizures and psychosis?

Accepted Answer

Claviceps purpurea

Question 10

Which of the following is a correct match between a fungal phylum and its sexual spore type?

Accepted Answer

Zygomycota – zygospore

Question 11

A patient with AIDS develops pneumonia caused by Pneumocystis. This is an example of which type of mycosis?

Accepted Answer

Opportunistic mycosis

Question 12

Which of the following is NOT a typical nutritional adaptation of fungi?

Accepted Answer

Optimal growth at pH 7.4

Question 13

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

Accepted Answer

Amoebozoa (Sarcodina)

Question 14

Which protozoan is the only ciliate known to cause human disease, and what disease does it cause?

Accepted Answer

Balantidium coli; dysentery

Question 15

Which stage in the Plasmodium life cycle is responsible for infecting human red blood cells?

Accepted Answer

Merozoite

Question 16

Which of the following statements about helminths is TRUE?

Accepted Answer

Helminths are specialized to live in hosts and may lack digestive systems.

Question 17

Which helminth group includes flat, leaf-shaped organisms that absorb food through their cuticle and possess oral and ventral suckers?

Accepted Answer

Trematodes (flukes)

Question 18

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

Accepted Answer

Scolex

Question 19

Which of the following arthropod classes is correctly matched with its characteristic?

Accepted Answer

Crustacea – four antennae

Question 20

In the transmission of malaria, the Anopheles mosquito serves as which type of host for Plasmodium?

Accepted Answer

Definitive host

Chapter 12: The Eukaryotes – Fungi, Algae, Protozoa, and Helminths

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