Question 1

Which of the following best describes the field of mycology?

Accepted Answer

The study of fungi, including their biology and diseases they cause

Question 2

A patient presents with a skin infection caused by a fungus. This type of disease is best classified as:

Accepted Answer

A mycosis

Question 3

Which of the following statements correctly distinguishes between yeasts and molds?

Accepted Answer

Yeasts reproduce by budding, while molds grow as hyphae

Question 4

Fungi are classified as which of the following based on their mode of nutrition?

Accepted Answer

Chemoheterotrophs

Question 5

Saprophytic fungi obtain their nutrition primarily from:

Accepted Answer

Dead organic matter

Question 6

Parasitic fungi differ from saprophytic fungi in that they obtain nutrients from:

Accepted Answer

Living hosts

Question 7

Yeasts are capable of which two metabolic processes?

Accepted Answer

Aerobic cellular respiration and fermentation

Question 8

Organisms that can perform both aerobic cellular respiration and fermentation are called:

Accepted Answer

Facultative anaerobes

Question 9

The process by which yeasts divide is called:

Accepted Answer

Budding

Question 10

In a microscopic image of budding yeast, which structure is the bud?

Accepted Answer

The smaller, newly forming cell attached to the mother cell

Question 11

What are hyphae, and what is their role in fungal pathogenesis?

Accepted Answer

Hyphae are filamentous structures that invade host tissues

Question 12

Which of the following correctly matches the fungal structure with its description?

Accepted Answer

Blastoconidia: asexual spores formed by budding

Question 13

Which medium is commonly used to grow yeasts and is selective for fungi due to its low pH?

Accepted Answer

Sabouraud Dextrose Agar (SDA)

Question 14

Why is Sabouraud Dextrose Agar (SDA) considered a selective medium?

Accepted Answer

Its low pH inhibits most bacteria but allows fungi to grow

Question 15

Mycosel agar is used in clinical labs because it is selective for pathogenic fungi. What makes it selective?

Accepted Answer

It contains antibiotics that inhibit bacteria and saprophytic fungi

Question 16

Rice extract agar is primarily used for which purpose in mycology labs?

Accepted Answer

To stimulate the production of chlamydospores in certain fungi

Question 17

A clinical sample is inoculated onto both SDA and TSA. After incubation, colonies grow on SDA but not on TSA. What is the most likely explanation?

Accepted Answer

The organism is a fungus that thrives in acidic conditions

Question 18

Which of the following equations best represents the fermentation of glucose by yeast?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$ \rightarrow 2C_2H_5OH + 2CO_2}$$

Question 19

A laboratory technician wants to isolate a pathogenic yeast from a mixed sample containing bacteria and saprophytic fungi. Which medium should they use and why?

Accepted Answer

Mycosel agar, because it contains antibiotics that inhibit bacteria and saprophytic fungi

Question 20

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

Accepted Answer

They use organic compounds for both energy and carbon

Microbiology Study Guide: Fungi, Yeasts, Molds, and Laboratory Media

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