Question 1

Which of the following statements best describes the role of the human microbiome?

Accepted Answer

It helps maintain health, prevents growth of pathogens, and may train the immune system.

Question 2

Which scientist is credited with disproving the theory of spontaneous generation using swan-necked flasks?

Accepted Answer

Louis Pasteur

Question 3

Which of the following is NOT a characteristic of bacteria?

Accepted Answer

They contain a nucleus surrounded by a membrane.

Question 4

Which of the following best explains why viruses are considered acellular?

Accepted Answer

They lack cellular structure and can only replicate inside a host cell.

Question 5

Which of the following pairs is correctly matched with its description?

Accepted Answer

Archaea – prokaryotic, may lack cell wall, often extremophiles

Question 6

Which of the following is an example of applied microbiology in industry?

Accepted Answer

Using bacteria to produce insulin

Question 7

Which of the following equations best represents the process of photosynthesis carried out by algae?

Accepted Answer

$$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6$ + 6O_2$$

Question 8

Which of the following is a correct application of Koch’s postulates?

Accepted Answer

Demonstrating that a specific microbe causes a specific disease by isolating and re-infecting a healthy host.

Question 9

Which of the following best describes the difference between normal microbiota and transient microbiota?

Accepted Answer

Normal microbiota colonize the body indefinitely, while transient microbiota are present for a short time.

Question 10

Which of the following historical experiments provided evidence against spontaneous generation?

Accepted Answer

Lazzaro Spallanzani’s sealed and boiled nutrient solutions

Question 11

Which of the following is a correct example of binomial nomenclature?

Accepted Answer

Escherichia coli

Question 12

Which of the following best describes the Germ Theory of Disease?

Accepted Answer

Microorganisms are responsible for causing specific diseases.

Question 13

Which of the following is a correct statement about the three domains of life as classified by Carl Woese?

Accepted Answer

Bacteria, Archaea, and Eukarya

Question 14

Which of the following is a real-world example of microbial fermentation?

Accepted Answer

Conversion of sugar to alcohol in the absence of oxygen

Question 15

Which of the following best describes the function of pasteurization?

Accepted Answer

Applying high heat for a short time to kill harmful bacteria in beverages

Question 16

Which of the following is a correct match between a branch of microbiology and its focus?

Accepted Answer

Parasitology – study of protozoa and parasitic worms

Question 17

Which of the following discoveries is correctly matched with the scientist responsible?

Accepted Answer

Discovery of penicillin – Alexander Fleming

Question 18

Which of the following best explains why archaea are often found in extreme environments?

Accepted Answer

They possess unique membrane lipids and enzymes adapted to extreme conditions.

Question 19

Which of the following is a correct description of the process of binary fission?

Accepted Answer

A process by which a single prokaryotic cell divides into two identical daughter cells

Question 20

Which of the following best describes the contribution of Edward Jenner to microbiology?

Accepted Answer

He developed the first vaccine by inoculating a person with cowpox to protect against smallpox.

Introduction to Microbiology: The Microbial World and You

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