Question 1

Which of the following statements best describes the role of microbes in oxygen production?

Accepted Answer

Microbes such as algae and cyanobacteria generate oxygen by photosynthesis.

Question 2

Which scientist established the system of scientific nomenclature for microorganisms, and what is the correct format for writing a scientific name?

Accepted Answer

Carolus Linnaeus; genus is capitalized, species is lowercase, and both are italicized or underlined.

Question 3

Which of the following is NOT a characteristic of bacteria?

Accepted Answer

They have a distinct nucleus surrounded by a membrane.

Question 4

Which group of microorganisms is most likely to be found in extreme environments such as hot springs or salt lakes?

Accepted Answer

Archaea

Question 5

A scientist observes a single-celled organism with chitin cell walls and a distinct nucleus. Which type of microbe is being observed?

Accepted Answer

Fungus

Question 6

Which of the following statements about viruses is TRUE?

Accepted Answer

Viruses can replicate only inside a living host cell.

Question 7

Which milestone in microbiology is associated with the development of aseptic surgery?

Accepted Answer

Lister's use of chemical antiseptics

Question 8

Which of the following is an example of bioremediation?

Accepted Answer

Using bacteria to degrade organic matter in sewage.

Question 9

Which of the following is a correct statement about Koch's postulates?

Accepted Answer

They are used to prove that a specific microbe causes a specific disease.

Question 10

Which of the following is a function of normal microbiota in the human body?

Accepted Answer

Producing nutrients and protecting against pathogens.

Question 11

Which of the following is a plausible reason why biofilms are often resistant to antibiotics?

Accepted Answer

Biofilms create a protective matrix that limits antibiotic penetration.

Question 12

Which of the following emerging infectious diseases is caused by a bacterium?

Accepted Answer

Methicillin-resistant Staphylococcus aureus (MRSA)

Question 13

Which of the following statements about the Germ Theory of Disease is correct?

Accepted Answer

It was supported by Koch's experimental steps linking microbes to specific diseases.

Question 14

Which of the following is NOT a function performed by microbes in our lives?

Accepted Answer

Causing all human diseases

Question 15

Which equation best represents binary fission in bacteria, where $$N is $$the number of cells after $$n$$ generations and $$N_0 is $$the initial number of cells?

Accepted Answer

$$N = N_0$ 	imes 2^n$$

Question 16

Which of the following is a correct application of recombinant DNA technology?

Accepted Answer

Using bacteria to produce human insulin.

Question 17

Which scientist is credited with disproving the theory of spontaneous generation?

Accepted Answer

Louis Pasteur

Question 18

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

Accepted Answer

Archaea often live in extreme environments.

Question 19

Which of the following is a correct statement about protozoa?

Accepted Answer

Protozoa may be motile via pseudopods, cilia, or flagella.

Question 20

Which of the following is a correct example of microbial ecology?

Accepted Answer

Studying how bacteria convert nitrogen into forms usable by plants.

Introduction to Microbiology: The Microbial World and You

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