Question 1

Which of the following best explains why fungal infections are often more difficult to treat in humans compared to bacterial infections?

Accepted Answer

Fungi and human cells are both eukaryotic, so drugs targeting fungi may also harm human cells.

Question 2

Which anatomical feature of filamentous fungi is responsible for anchoring the fungus and absorbing nutrients from the substrate?

Accepted Answer

Vegetative hypha

Question 3

A fungal species is observed to switch from yeast-like growth at 25°C to mold-like growth at 37°C. What term best describes this organism?

Accepted Answer

Dimorphic fungus

Question 4

Which of the following is a defining characteristic of fungi that distinguishes them from bacteria?

Accepted Answer

Fungi can metabolize complex carbohydrates such as lignin, which most bacteria cannot.

Question 5

Which type of fungal spore is produced within a sac at the end of an aerial hypha and can contain hundreds of spores?

Accepted Answer

Sporangiospore

Question 6

A patient presents with a chronic fungal infection that has spread from the lungs to other organs. Which class of mycosis does this infection most likely belong to?

Accepted Answer

Systemic mycosis

Question 7

Which phase of fungal sexual reproduction involves the fusion of two haploid cells with mixing of their cytoplasm?

Accepted Answer

Plasmogamy

Question 8

Which medically important fungal phylum is characterized by the production of zygospores during sexual reproduction and coenocytic hyphae?

Accepted Answer

Zygomycota

Question 9

Which of the following best describes the nutritional relationship in a lichen?

Accepted Answer

The alga produces carbohydrates, while the fungus provides attachment and protection.

Question 10

Which of the following statements about yeast energy production is correct?

Accepted Answer

Yeast can use $O_2$ or an organic compound as a final electron acceptor, allowing both respiration and fermentation.

Question 11

Which of the following is a correct description of the Crabtree effect in yeast?

Accepted Answer

Yeast produce ethanol aerobically when exposed to high external glucose concentrations.

Question 12

Which of the following is true regarding the life cycle of Plasmodium vivax?

Accepted Answer

Mosquitoes are the definitive host where sexual reproduction occurs.

Question 13

Which of the following best differentiates a cyst from an oocyst in protozoa?

Accepted Answer

A cyst is a dormant, protective stage, while an oocyst is a reproductive structure common in Apicomplexa.

Question 14

Which of the following protozoan groups is characterized by movement using cilia and includes the only human parasite that causes dysentery?

Accepted Answer

Ciliophora

Question 15

Which method do amebae use to facilitate phagocytosis?

Accepted Answer

Engulfing food by surrounding it with pseudopods

Question 16

Which of the following is a correct statement about the role of mycorrhizae in plant-fungal symbiosis?

Accepted Answer

Mycorrhizae act as a virtual root system, helping plants absorb water and nutrients while fungi receive carbohydrates.

Question 17

Which of the following is a distinguishing feature of Zygomycota compared to Ascomycota and Basidiomycota?

Accepted Answer

Zygomycota produce zygospores during sexual reproduction.

Question 18

Which of the following statements about fungal asexual reproduction is correct?

Accepted Answer

Asexual spores are genetically identical to the parent and originate from a single hypha.

Question 19

A scientist is studying a fungus that only reproduces asexually and cannot be classified based on sexual spores. What term historically described such fungi?

Accepted Answer

Deuteromycota

Eukaryotes: Fungi and Protozoa – Structure, Function, and Medical Importance

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