Question 1

Which of the following statements best explains why fungi are classified as chemoheterotrophs?

Accepted Answer

They absorb organic nutrients from their environment and decompose organic matter.

Question 2

A fungal cell is observed to have septate hyphae. What does this indicate about its cellular structure?

Accepted Answer

It contains cross-walls that divide the filament into individual cells.

Question 3

Which type of fungal spore is produced by mitosis and is not enclosed in a sac?

Accepted Answer

Conidiospore

Question 4

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

Accepted Answer

Superficial mycosis

Question 5

Which phase of sexual reproduction in fungi involves the fusion of haploid nuclei to form a diploid zygote?

Accepted Answer

Karyogamy

Question 6

A fungus is found to grow optimally at pH 5, in low moisture, and can metabolize complex carbohydrates. What does this suggest about its ecological role?

Accepted Answer

It is adapted to decomposing organic matter in harsh environments.

Question 7

Which medically important fungal phylum is characterized by coenocytic (aseptate) hyphae and produces sporangiospores asexually?

Accepted Answer

Mucoromycota (Zygomycota)

Question 8

A yeast is observed to divide unevenly, producing a smaller daughter cell. What is this process called?

Accepted Answer

Budding

Question 9

Which of the following fungi is known for producing ergot toxin, a potent neurotoxin that can cause seizures and psychosis?

Accepted Answer

Claviceps purpurea

Question 10

Which of the following is TRUE regarding Microsporidia?

Accepted Answer

They are obligate intracellular parasites and lack mitochondria.

Question 11

A dimorphic fungus is isolated from a patient. At 37°C, it grows as a yeast, but at 25°C, it forms hyphae. What is the significance of this property?

Accepted Answer

Dimorphism allows the fungus to adapt to different environments and is common among pathogenic fungi.

Question 12

Which of the following best describes the difference between fungal and bacterial cell walls?

Accepted Answer

Fungal cell walls contain glucans, mannans, and chitin, while bacterial cell walls contain peptidoglycan.

Question 13

Which type of fungal spore is formed by meiosis and is produced externally on a pedestal structure called a basidium?

Accepted Answer

Basidiospore

Question 14

A patient with AIDS develops pneumonia caused by Pneumocystis. What type of mycosis is this?

Accepted Answer

Opportunistic mycosis

Question 15

Which of the following economic uses of fungi is correctly matched?

Accepted Answer

Aspergillus niger: production of citric acid

Question 16

Which of the following is a correct sequence of events in the sexual reproduction of fungi?

Accepted Answer

Plasmogamy → Karyogamy → Meiosis

Question 17

A fungal infection is diagnosed as ringworm. Which type of mycosis and pathogen is most likely responsible?

Accepted Answer

Cutaneous mycosis; dermatophytes

Question 18

Which of the following statements about yeast division is correct?

Accepted Answer

Fission yeasts divide evenly, while budding yeasts divide unevenly.

Question 19

Which of the following is NOT a characteristic of fungi?

Accepted Answer

They carry out photosynthesis.

Question 20

A fungal species is found to produce both conidiospores and ascospores. To which phylum does it most likely belong?

Accepted Answer

Ascomycota

Chapter 12: The Eukaryotes—Fungi, Algae, Protozoa, and Helminths (Microbiology Study Notes)

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