Question 1

Which of the following best describes the main difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have a nucleus, while prokaryotic cells do not.

Question 2

Which scientist is credited with disproving the theory of spontaneous generation using an S-shaped flask experiment?

Accepted Answer

Louis Pasteur

Question 3

Which of the following is NOT a function of normal microbiota in the human body?

Accepted Answer

Causing infectious diseases under all circumstances

Question 4

Which of the following statements about viruses is TRUE?

Accepted Answer

Viruses are acellular and require a living host cell to replicate.

Question 5

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

Accepted Answer

Escherichia coli

Question 6

Which of the following best explains why Bacillus thuringiensis is used in agriculture?

Accepted Answer

It produces protein crystals toxic to insects but harmless to plants and animals.

Question 7

Which of the following is a key component of Koch's postulates for linking a specific microbe to a specific disease?

Accepted Answer

The microbe must be present in all cases of the disease and absent from healthy individuals.

Question 8

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

Accepted Answer

Using bacteria to degrade oil spills in the ocean

Question 9

Which of the following best describes the process of pasteurization?

Accepted Answer

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

Question 10

Which of the following is a plausible consequence of overusing antimicrobial chemicals?

Accepted Answer

Development of drug-resistant pathogens

Question 11

Which of the following is a distinguishing feature of Archaea compared to Bacteria?

Accepted Answer

Archaea often live in extreme environments.

Question 12

Which of the following is an example of a eukaryotic microorganism?

Accepted Answer

Saccharomyces cerevisiae (yeast)

Question 13

Which of the following best describes the role of biofilms in human health?

Accepted Answer

Biofilms can cause infections and are often resistant to antibiotics.

Question 14

Which of the following is a correct statement about the microbiome?

Accepted Answer

The microbiome helps maintain health and can prevent the growth of pathogens.

Question 15

Which of the following is a correct application of the Germ Theory of Disease?

Accepted Answer

Specific diseases are caused by specific microorganisms.

Question 16

Which of the following is a real-life example of recombinant DNA technology?

Accepted Answer

Using bacteria to produce human insulin

Question 17

Which of the following is a plausible reason why emerging infectious diseases (EIDs) are increasing in incidence?

Accepted Answer

Increased global travel and changes in human behavior

Question 18

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

Accepted Answer

Conversion of sugar to alcohol by microbes in the absence of air

Question 19

Which of the following is a correct statement about the use of antibiotics?

Accepted Answer

Antibiotics are chemicals produced by bacteria and fungi that inhibit or kill other microbes.

Question 20

Which of the following is a correct example of a disease caused by a protozoan?

Accepted Answer

Malaria

Introduction to Microbiology: The Microbial World and You

Study Guide - Practice Questions