Question 1

Which of the following is the most important vector for the transmission of malaria?

Accepted Answer

Mosquitoes

Question 2

Which environmental factor is most likely to activate oncogenes and contribute to cancer development?

Accepted Answer

Exposure to ultraviolet (UV) radiation

Question 3

Which of the following best describes the structure of a naked capsid virus?

Accepted Answer

A protein shell surrounding nucleic acid without a lipid envelope

Question 4

Which disease is caused by prions in humans?

Accepted Answer

Creutzfeldt-Jakob disease

Question 5

Which of the following best describes mutualism in the symbiotic relationship between humans and microbes?

Accepted Answer

Both the human and the microbe benefit from the relationship

Question 6

Which type of flora is most likely to be removed by proper handwashing?

Accepted Answer

Transient flora

Question 7

A disease that occurs regularly in a population at a stable rate is best described as:

Accepted Answer

Endemic

Question 8

Which port of entry is most frequently used by microbes to enter the human body?

Accepted Answer

Respiratory tract

Question 9

Which of the following is an example of a sign of disease?

Accepted Answer

Fever

Question 10

Which term describes inanimate objects that can transmit infectious diseases?

Accepted Answer

Fomites

Question 11

Which of the following best describes an opportunistic infection?

Accepted Answer

An infection caused by a microbe that takes advantage of a weakened immune system

Question 12

Arrange the stages of infectious disease in the correct sequence:

Accepted Answer

Incubation, prodromal, illness, decline, convalescence

Question 13

Which of the following is a zoonotic infection?

Accepted Answer

Rabies

Question 14

What percentage of blood volume is plasma?

Accepted Answer

$$\approx 55\%$$

Question 15

Which white blood cell is primarily responsible for killing virally infected cells directly?

Accepted Answer

Cytotoxic T lymphocytes (CD8+)

Question 16

Which of the following is an example of innate immunity?

Accepted Answer

Lysozyme in tears

Question 17

What is the main outcome of complement cascade activation?

Accepted Answer

Formation of membrane attack complex (MAC) leading to lysis of bacteria

Question 18

Which primary lymphoid organ is responsible for the maturation of T lymphocytes?

Accepted Answer

Thymus

Question 19

Which class of antibody is most abundant in serum during a secondary immune response?

Accepted Answer

IgG

Question 20

A patient's serum contains $$0.3\ 	ext{mg/ml} of $$anti-microbe(X) IgM and $$1.1\ 	ext{mg/ml} of $$anti-microbe(X) IgG, and $$1\ 	ext{mg/ml} of $$anti-microbe(Y) IgM and $$0.1\ 	ext{mg/ml} of $$anti-microbe(Y) IgG. Which microbe has the patient been exposed to more recently?

Accepted Answer

Microbe Y

Microbiology Lecture Quiz 2 Study Guide (Chapters 12–16): Step-by-Step Guidance

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