Question 1

Which of the following best describes herd immunity?

Accepted Answer

Resistance to the spread of an infectious disease within a population due to a high proportion of immune individuals.

Question 2

A new pathogen requires an 85% immunity rate for herd immunity. In a population of 10,000, how many individuals must be immune to prevent the spread of this pathogen?

$$	ext{Number immune} = 0.85 	imes 10,000$$

Accepted Answer

8,500

Question 3

Which of the following is a drawback of live attenuated vaccines?

Accepted Answer

They may cause disease in immunocompromised individuals.

Question 4

Why do inactivated vaccines often require booster shots?

Accepted Answer

They cannot reproduce and may not elicit a strong, long-lasting immune response.

Question 5

Which of the following is NOT a typical ingredient in vaccines?

Accepted Answer

Antibiotics to treat infections

Question 6

A patient is given a vaccine that contains purified and inactivated toxins. Which type of vaccine did they receive?

Accepted Answer

Toxoid vaccine

Question 7

Which of the following statements about mRNA vaccines is TRUE?

Accepted Answer

mRNA vaccines deliver instructions to make viral proteins and the mRNA remains in the cytoplasm.

Question 8

Which of the following best explains why it takes about two weeks for antibody levels to peak after vaccination?

Accepted Answer

The immune system must create memory B and T cells, which requires time for activation and proliferation.

Question 9

Which of the following antimicrobial drugs would be most appropriate for treating a fungal infection?

Accepted Answer

Antifungal drug

Question 10

A drug that prevents bacteria from growing but does not kill them is classified as:

Accepted Answer

Bacteriostatic

Question 11

Which of the following is a broad-spectrum antibiotic that targets nucleic acids?

Accepted Answer

Quinolones

Question 12

Which cellular target is most likely affected by penicillins?

Accepted Answer

Cell wall synthesis

Question 13

A patient with a Gram-positive bacterial infection is prescribed vancomycin. Why is this drug considered narrow-spectrum?

Accepted Answer

It targets only a limited range of bacteria, mainly Gram-positive species.

Question 14

Which of the following is NOT a main activity targeted by antiviral drugs?

Accepted Answer

Cell wall synthesis

Question 15

A new antiviral drug is found to block the release of viruses from infected cells. Which stage of the viral life cycle does this drug target?

Accepted Answer

Viral release

Question 16

Which of the following best explains why booster shots are sometimes necessary for inactivated vaccines?

Accepted Answer

To compensate for weaker immunological memory and ensure long-term immunity.

Question 17

Which of the following is a concern specific to viral vector vaccines?

Accepted Answer

The genetic material delivered by the vector could enter the nucleus and incorporate into host DNA.

Question 18

Which of the following best describes the mechanism of action for sulfa drugs?

Accepted Answer

Inhibition of folic acid synthesis

Question 19

A patient is prescribed an antimicrobial drug that is effective against both Gram-negative and Gram-positive bacteria. This drug is classified as:

Accepted Answer

Broad-spectrum

Question 20

Which of the following is a benefit of live attenuated vaccines compared to inactivated vaccines?

Accepted Answer

They can stimulate potent immunological responses that are accompanied by long-lived memory.

Biomedical Applications: Vaccines, Diagnostics, Therapeutics, and Antimicrobial Drugs

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