Question 1

Which of the following best describes the process of vaccination?

Accepted Answer

The process of generating an artificial active immune response by exposure to an antigen or antigen mixture

Question 2

Which statement correctly differentiates innate and adaptive immunity?

Accepted Answer

Innate immunity uses primary effector cells and responds immediately, while adaptive immunity uses lymphocytes and develops memory after exposure

Question 3

What is the main advantage of immunizing with attenuated live cells or viruses compared to inactivated material?

Accepted Answer

It usually produces a more effective immune response

Question 4

Which of the following is an example of artificial passive immunity?

Accepted Answer

Receiving antivenom after a snake bite

Question 5

Why are booster immunizations important in vaccine schedules?

Accepted Answer

They produce a secondary response and a higher antibody titer

Question 6

Which type of vaccine couples a weakly immunogenic antigen to a protein carrier to enhance the immune response?

Accepted Answer

Conjugate vaccine

Question 7

How do DNA vaccines stimulate an immune response?

Accepted Answer

By cloning genes for target proteins into plasmid vectors, which are injected and expressed by host cells

Question 8

Which of the following is NOT a mechanism by which antiviral drugs act?

Accepted Answer

Inhibiting cell wall synthesis

Question 9

What is selective toxicity in the context of antibacterial drugs?

Accepted Answer

The ability of a drug to target microbial cells without harming host cells

Question 10

Which class of antibiotics targets cell wall synthesis and includes penicillins and cephalosporins?

Accepted Answer

Beta-lactam antibiotics

Question 11

A patient is diagnosed with a urinary tract infection caused by a gram-negative bacterium. Which drug class is most likely to be prescribed?

Accepted Answer

Quinolones (e.g., ciprofloxacin)

Question 12

Which antibiotic is produced by the fungus Cephalosporium and is commonly used to treat gonorrhea?

Accepted Answer

Cephalosporin

Question 13

Which of the following antibiotics targets protein synthesis by binding to the bacterial ribosome?

Accepted Answer

Aminoglycosides

Question 14

What is the mechanism of action of daptomycin?

Accepted Answer

Forms pores in the cytoplasmic membrane of gram-positive bacteria

Question 15

Which of the following is a growth factor analog effective only against Mycobacterium by interfering with mycolic acid synthesis?

Accepted Answer

Isoniazid

Question 16

Why does overuse of antibiotics accelerate antimicrobial drug resistance?

Accepted Answer

It selects for resistant bacteria, increasing their proportion in the population

Question 17

Which of the following is a new method for discovering antimicrobial drugs?

Accepted Answer

Screening natural products for antimicrobial activity

Question 18

A combination therapy for bacterial infections includes amoxicillin and clavulanic acid. What is the role of clavulanic acid?

Accepted Answer

It inhibits beta-lactamase enzymes, protecting amoxicillin from degradation

Question 19

Which of the following is a real-world application of bacteriophage therapy?

Accepted Answer

Treating antibiotic-resistant bacterial infections

Question 20

Which equation best represents the relationship between the rate of antimicrobial resistance ($$R) $$and antibiotic usage ($$U) in a $$population, assuming a direct proportionality?

Accepted Answer

$$R = kU$$

28. Immunity, Vaccines, and Antimicrobial Drugs: Microbiology Study Notes

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