Question 1

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

Accepted Answer

Normal microbiota help maintain good health by preventing the growth of pathogenic microbes and producing essential vitamins.

Question 2

Which scientist disproved the theory of spontaneous generation using S-shaped flasks?

Accepted Answer

Louis Pasteur

Question 3

Which of the following is NOT a characteristic of Archaea?

Accepted Answer

They are generally known to cause disease in humans.

Question 4

A scientist discovers a unicellular organism with a nucleus, chitin cell walls, and absorbs organic chemicals for energy. What type of microorganism is this?

Accepted Answer

Fungus

Question 5

Which of the following is the correct scientific name format for the bacterium that inhabits the human colon?

Accepted Answer

$$Escherichia coli$$

Question 6

Which of the following is a direct application of microbial ecology in environmental science?

Accepted Answer

Using bacteria to degrade organic matter in sewage treatment plants.

Question 7

Which of the following statements about viruses is TRUE?

Accepted Answer

Viruses consist of a DNA or RNA core surrounded by a protein coat.

Question 8

Which historical experiment provided evidence against spontaneous generation by showing that maggots only appeared in uncovered jars of meat?

Accepted Answer

Francesco Redi's meat jar experiment

Question 9

Which of the following is a function of biofilms that makes them clinically significant?

Accepted Answer

Biofilms can cause infections and are often resistant to antibiotics.

Question 10

Which of the following best explains Koch's postulates?

Accepted Answer

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

Question 11

A patient is diagnosed with MRSA. Which of the following statements is most accurate regarding this pathogen?

Accepted Answer

MRSA is resistant to penicillin and methicillin, and some strains are resistant to vancomycin.

Question 12

Which of the following is an example of biotechnology using recombinant DNA technology?

Accepted Answer

Producing insulin using genetically modified bacteria.

Question 13

Which of the following emerging infectious diseases is transmitted by the bite of an infected Aedes mosquito and can cause severe birth defects if contracted during pregnancy?

Accepted Answer

Zika virus disease

Question 14

Which of the following is a correct statement about the Human Microbiome Project?

Accepted Answer

Its goal was to determine the makeup of typical microbiota of various areas of the body and understand their relationship to human diseases.

Question 15

Which of the following is a distinguishing feature of protozoa compared to other microorganisms?

Accepted Answer

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

Question 16

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

Accepted Answer

Using bacteria to detoxify mercury in contaminated water.

Question 17

Which of the following equations best represents the microbial conversion of sugar to alcohol in fermentation?

Accepted Answer

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

Question 18

Which of the following is a major advance in immunology attributed to Rebecca Lancefield?

Accepted Answer

She classified streptococci based on their cell wall components.

Question 19

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

Accepted Answer

Development of resistance in microbes.

Introduction to Microbiology: The Microbial World and You

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