Question 1

Which of the following best describes the correct scientific nomenclature for microorganisms?

Accepted Answer

The genus is capitalized and italicized; the species is lowercase and italicized.

Question 2

Which of the following statements about bacteria is TRUE?

Accepted Answer

Bacteria are unicellular prokaryotes with cell walls made of peptidoglycan.

Question 3

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

Accepted Answer

Causing infectious disease in healthy individuals

Question 4

Which scientist's experiment with swan-necked flasks helped disprove the theory of spontaneous generation?

Accepted Answer

Louis Pasteur

Question 5

A patient develops an infection after a medical device is implanted. The infection is difficult to treat and resistant to antibiotics. Which microbial structure is most likely responsible?

Accepted Answer

Biofilm

Question 6

Which of the following is a key difference between fungi and protozoa?

Accepted Answer

Fungi have cell walls made of chitin, while protozoa lack cell walls.

Question 7

Which of the following equations correctly represents the relationship between the number of human cells and bacterial cells in the human body?

Accepted Answer

$$10^{12}$$ human cells : $$10^{13}$$ bacterial cells

Question 8

Which of the following is an example of an emerging infectious disease?

Accepted Answer

Methicillin-resistant Staphylococcus aureus (MRSA)

Question 9

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

Accepted Answer

A pure culture of the pathogen must cause disease when inoculated into a healthy host.

Question 10

Which of the following best explains why overuse of antibiotics can lead to resistance?

Accepted Answer

Antibiotics select for bacteria with resistance genes, which then proliferate.

Question 11

Which of the following is TRUE about viruses?

Accepted Answer

Viruses require host cell machinery for reproduction.

Question 12

Which of the following is a function of biofilms in the human body?

Accepted Answer

Biofilms can protect mucous membranes and teeth from pathogens.

Question 13

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

Accepted Answer

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

Question 14

Which of the following is NOT a major group of medically important microorganisms?

Accepted Answer

Plants

Question 15

Which of the following best describes the role of fermentation in the spoilage of wine and beer?

Accepted Answer

Yeast ferment sugars into alcohol in the absence of air.

Question 16

Which of the following is a correct example of a scientific name written in proper notation?

Accepted Answer

$$	extit{Escherichia coli}$$

Question 17

Which of the following is a plausible reason for the emergence of new infectious diseases?

Accepted Answer

Genetic changes in pathogens leading to antibiotic resistance

Question 18

Which of the following is TRUE regarding the discovery of penicillin?

Accepted Answer

Penicillin was discovered by Alexander Fleming as an antibiotic produced by a fungus.

Question 19

Which of the following is a correct statement about protozoa?

Accepted Answer

Protozoa are unicellular eukaryotes that may move using flagella, pseudopods, or cilia.

Introduction to Medical Microbiology: Foundational Concepts and Applications

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