Question 1

Which of the following best describes the process of variolation practiced in ancient China?

Accepted Answer

Introducing material from smallpox lesions into healthy individuals to induce immunity against smallpox

Question 2

Edward Jenner's scientific contribution involved which of the following?

Accepted Answer

Developing the first vaccine using cowpox to protect against smallpox

Question 3

Which disease is currently targeted for eradication after smallpox, and why is eradication challenging?

Accepted Answer

Polio; because asymptomatic carriers can transmit the virus

Question 4

The 1998 study published in The Lancet falsely linked which vaccine to autism, and what was the outcome?

Accepted Answer

MMR vaccine; the study was retracted and the lead author lost his medical license

Question 5

Which disease has shown the strongest reemergence in the US and UK due to declining vaccination rates?

Accepted Answer

Measles

Question 6

Vaccines induce which type of immunity?

Accepted Answer

Artificially acquired active immunity

Question 7

For a vaccine to be considered effective, which immune response must be stimulated?

Accepted Answer

Adaptive immune response, including Memory B and T cells

Question 8

Herd immunity protects which two vulnerable populations?

Accepted Answer

Infants and immunocompromised individuals

Question 9

Shingles is described as a sequela to chickenpox. What does this mean?

Accepted Answer

Shingles occurs as a subsequent condition following chickenpox infection

Question 10

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

Accepted Answer

They elicit strong, long-lasting immune responses and immunological memory

Question 11

What is an adjuvant in the context of vaccines?

Accepted Answer

A substance added to a vaccine to enhance the immune response

Question 12

Which two molecules are typically conjugated in conjugate vaccines, and why?

Accepted Answer

Polysaccharides and proteins; to enhance immunogenicity in young children

Question 13

Which statement about mRNA vaccines is correct?

Accepted Answer

mRNA vaccines provide instructions for cells to produce a specific protein antigen, but do not alter DNA

Question 14

What is the main advantage of inactivated vaccines over live attenuated vaccines?

Accepted Answer

They are safer for immunocompromised individuals and cannot revert to virulence

Question 15

Which serological test is commonly used for blood typing and confirming a syphilis diagnosis?

Accepted Answer

Agglutination test

Question 16

In a direct ELISA, what is detected in a patient's serum and what does a positive reaction indicate?

Accepted Answer

Antigen; indicates current, active infection

Question 17

What is the primary function of Taq polymerase in PCR?

Accepted Answer

It synthesizes new DNA strands at high temperatures

Question 18

During PCR, three temperature steps are cycled. What occurs at the highest temperature?

Accepted Answer

Denaturation of double-stranded DNA into single strands

Question 19

Which enzyme is required in addition to Taq polymerase for RT-PCR, and what is its function?

Accepted Answer

Reverse transcriptase; synthesizes complementary DNA from RNA template

Question 20

What is the main purpose of the Genetic Information Nondiscrimination Act (GINA) of 2008?

Accepted Answer

To prevent discrimination based on genetic information in health insurance and employment

Microbiology Study Guide: Vaccines, Diagnostics, Therapeutics, and Molecular Methods (Chapter 14)

Study Guide - Practice Questions