Question 1

Which of the following statements best describes the role of normal microbiota in human health?

Accepted Answer

They help maintain health by preventing the growth of pathogenic microbes and may help train the immune system.

Question 2

Which of the following is NOT a characteristic of Archaea?

Accepted Answer

They are known to cause disease in humans.

Question 3

Which scientist is credited with disproving the theory of spontaneous generation using a swan-neck flask experiment?

Accepted Answer

Louis Pasteur

Question 4

Which of the following best describes the process of fermentation as demonstrated by Pasteur?

Accepted Answer

The microbial conversion of sugar to alcohol in the absence of air.

Question 5

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 it from a diseased animal and reproducing the disease in a healthy animal.

Question 6

Which of the following is NOT a function of microbes in the environment?

Accepted Answer

Causing all infectious diseases in humans

Question 7

Which of the following statements about viruses is TRUE?

Accepted Answer

Viruses are acellular and can only replicate inside a living host cell.

Question 8

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 colonize the body for a short period.

Question 9

Which of the following is a real-world example of a biofilm causing a problem?

Accepted Answer

Biofilms clogging water pipes and causing infections on medical implants.

Question 10

Which of the following is the correct scientific name format for the bacterium that lives in the human colon and was named after its discoverer?

Accepted Answer

$$Escherichia~coli$$

Question 11

Which of the following is NOT a domain in the three-domain system of classification?

Accepted Answer

Protista

Question 12

Which of the following best describes the contribution of Alexander Fleming to microbiology?

Accepted Answer

He discovered the first antibiotic, penicillin, produced by a fungus.

Question 13

Which of the following is a distinguishing feature of fungi compared to bacteria?

Accepted Answer

Fungi have chitin cell walls and are eukaryotic.

Question 14

A patient develops an infection on a medical implant that is resistant to antibiotics. Which microbial property most likely explains this phenomenon?

Accepted Answer

The bacteria have formed a biofilm on the implant.

Question 15

Which of the following is the best definition of resistance in the context of microbiology?

Accepted Answer

The ability of the body to ward off disease.

Question 16

Which of the following is a correct pairing of a field of microbiology with its focus?

Accepted Answer

Mycology – study of fungi

Question 17

Which of the following statements about the Human Microbiome Project is TRUE?

Accepted Answer

It aimed to determine the makeup of typical microbiota in various areas of the body and understand their relationship to disease.

Question 18

Which of the following is a correct description of the difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have a distinct nucleus, while prokaryotic cells lack a nucleus.

Question 19

Which of the following is an example of a chemical product produced by microbes that is used in disease treatment?

Accepted Answer

Insulin

Introduction to Microbiology: The Microbial World and You

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