$\text{ATP} + \text{H}^+_{\text{inside}} \rightarrow \text{ADP} + \text{H}^+_{\text{outside}}$

$\text{RNA} \xrightarrow{\text{reverse transcriptase}} \text{DNA}$

Question 1

Which structural component is unique to fungal cell walls and provides high tensile strength?

Accepted Answer

Chitin

Question 2

Which of the following best describes the alternation of generations in yeast, as seen in the replication cycle of *Saccharomyces cerevisiae*?

Accepted Answer

Yeast alternates between haploid and diploid states, with mating and meiosis triggered by environmental stress.

Question 3

Which mechanism allows fungi to extend their hyphae through plant cell walls?

Accepted Answer

Secretion of Ca$^{2+}$ ions and vesicles from the Golgi apparatus, combined with ATP-driven H$^+$ pumping to increase turgor pressure.

Question 4

Which type of fungal spore is produced by the fusion of haploid cells during sexual reproduction?

Accepted Answer

Zygospore

Question 5

What is the main advantage of dimorphic fungi being yeast-like at 37°C and mold-like at 25°C?

Accepted Answer

Yeast-like forms reproduce quickly, while mold-like forms are sturdy and resistant to environmental stress.

Question 6

Which of the following is a mutualistic combination of a fungus and a photosynthetic organism, providing both structural support and carbohydrates?

Accepted Answer

Lichen

Question 7

Which mechanism of motility is used by amoebozoa protists?

Accepted Answer

Pseudopodia

Question 8

Which process describes the origin of mitochondria and chloroplasts in eukaryotic cells?

Accepted Answer

Endosymbiosis

Question 9

Which viral classification scheme is based on genome type and the number of steps required to produce mRNA?

Accepted Answer

Baltimore classification

Question 10

Which of the following is NOT a structural component of viruses?

Accepted Answer

Chitin cell wall

Question 11

Which group of viruses uses reverse transcriptase to convert RNA into DNA during replication?

Accepted Answer

Group 6 (Retroviruses)

Question 12

Which cycle involves the integration of phage DNA into the bacterial chromosome, allowing replication without immediate lysis?

Accepted Answer

Lysogenic cycle

Question 13

Which of the following is a difference between viruses and prions?

Accepted Answer

Viruses contain nucleic acids, while prions are misfolded proteins without nucleic acids.

Question 14

Which method is NOT used to identify pathogens in clinical microbiology?

Accepted Answer

Photosynthetic activity measurement

Question 15

Which equation best represents the process of ATP-driven ion exchange in fungal hyphae extension?

Accepted Answer

$	ext{ATP} + 	ext{H}^+_{	ext{inside}} ightarrow 	ext{ADP} + 	ext{H}^+_{	ext{outside}}$

Question 16

Which of the following is a reason why some microbiota are transient in the human body?

Accepted Answer

Changes in nutrition, lifestyle, and physical/chemical environment.

Question 17

Which step in Koch’s postulates involves isolating the pathogen from a diseased organism and growing it in pure culture?

Accepted Answer

Step 2

Question 18

Which of the following is a real-world example of mycoremediation?

Accepted Answer

Using oyster mushrooms to clean up oil spills.

Question 19

Which equation represents the conversion of viral RNA to DNA by reverse transcriptase in retroviruses?

Accepted Answer

$	ext{RNA} \xrightarrow{	ext{reverse transcriptase}} 	ext{DNA}$

Question 20

Which of the following best describes the role of commensal and mutualistic microbiota in the human gut?

Accepted Answer

They provide essential vitamins such as vitamin K and B, and protect against pathogens.

Microbiology Study Guide: Fungi, Protists, Viruses, and Epidemiology

Study Guide - Practice Questions