Question 1

Which of the following statements best describes the main difference between mitosis and meiosis in eukaryotic cells?

Accepted Answer

Mitosis results in two genetically identical daughter cells, while meiosis results in four genetically unique daughter cells.

Question 2

A patient presents with a fungal infection caused by Trichophyton mentagrophytes. Which of the following best describes the nutritional strategy of this fungus?

Accepted Answer

It is a saprobe that absorbs nutrients from dead organic matter.

Question 3

Which of the following is a distinguishing feature of the fungal cell wall compared to bacterial cell walls?

Accepted Answer

Fungal cell walls are composed primarily of chitin and β-glucan.

Question 4

Which type of hyphae is characterized by the presence of cross-walls (septa) dividing the filament into segments?

Accepted Answer

Septate hyphae

Question 5

A fungus is observed to grow as a yeast at 37°C and as a mold at 25°C. What is the term for this phenomenon?

Accepted Answer

Dimorphism

Question 6

Which of the following best describes the process by which filamentous fungi obtain nutrients?

Accepted Answer

They secrete enzymes into the substrate and absorb the resulting small molecules.

Question 7

Which type of asexual spore is formed by successive cleavages within a sac-like structure and released when the sac ruptures?

Accepted Answer

Sporangiospore

Question 8

A laboratory is attempting to identify a fungal pathogen. Which of the following characteristics is LEAST likely to be used for identification?

Accepted Answer

Ability to photosynthesize

Question 9

Which division of fungi is characterized by aseptate hyphae and the production of zygospores during sexual reproduction?

Accepted Answer

Zygomycota

Question 10

A patient develops a rapidly progressing infection of the nasal cavity and face after immunosuppression. Which fungal group is most likely responsible?

Accepted Answer

Zygomycota (e.g., Mucor sp.)

Question 11

Which of the following is TRUE regarding the sexual reproduction of Ascomycota?

Accepted Answer

Meiosis in the ascus produces four haploid cells, followed by mitosis to yield eight ascospores.

Question 12

Which of the following best describes the clinical significance of Aspergillus species?

Accepted Answer

They cause aspergillosis, a respiratory disease in birds and mammals.

Question 13

Which group of fungi is known as 'Fungi imperfecti' due to the absence of observed sexual reproduction?

Accepted Answer

Deuteromycetes

Question 14

A yeast is observed to reproduce only by budding and never forms sexual spores. To which group does it most likely belong?

Accepted Answer

Deuteromycetes

Question 15

Which of the following is a correct pairing of fungal group and its sexual spore?

Accepted Answer

Ascomycota – ascospore

Question 16

Which of the following best explains why most fungi grow best at mildly acidic pH (5-6)?

Accepted Answer

They are adapted to decompose organic matter, which often acidifies their environment.

Question 17

Which of the following is NOT a characteristic shared by all fungi?

Accepted Answer

Ability to photosynthesize

Question 18

A clinical specimen is found to contain septate hyphae and conidiospores, but no sexual spores are observed. Which group is this fungus most likely classified under?

Accepted Answer

Deuteromycetes

Question 19

Which of the following equations correctly represents the ploidy changes during the fungal sexual life cycle?

Accepted Answer

$$n + n \rightarrow 2n \rightarrow n$$

Question 20

A patient from the Ohio River Valley presents with a lung infection caused by Histoplasma capsulatum. Which group does this pathogen belong to, and what is a key feature of its reproduction?

Accepted Answer

Deuteromycetes; only asexual reproduction by conidiospores

Eukaryotic Microbes: Fungi – Structure, Reproduction, and Clinical Relevance

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