Test Practice Questions

Question 1

A relationship between two organisms in which one partner benefits and the other is neither helped nor harmed is termed:

Mutualism
Parasitism
Commensalism
Symbiosis

Answer 1

Commensalism

Question 1

What term is used to describe the interaction between two different organisms living in close physical association, typically to the advantage of both?

Commensalism
Symbiosis
Parasitism
Dysbiosis

Answer 1

Symbiosis

Question 2

Which of the following best describes an endemic?

A) A disease that occurs irregularly and infrequently in a population.

B) A disease that is constantly present at a stable level within a specific geographic area or population.

C) A sudden increase in the number of cases of a disease above what is normally expected in a specific area or population.

D) A disease outbreak that spreads across multiple countries or continents, affecting a large number of people.

Answer 2

B) A disease that is constantly present at a stable level within a specific geographic area or population.

Question 3

A new diagnostic test for detecting Staphylococcus aureus infection has a specificity of 95%. What does this imply about the test?

Answer 3

The test correctly identifies 95% of individuals who have Staphylococcus aureus.

Question 4

Which innate, physical host defence mechanism is associated with the respiratory tract?

A. Water-repelling keratin proteins.
B. Lysozyme enzymes.
C. Mucociliary escalator.
D. Salivary amylase.

Answer 4

C. Mucociliary escalator.

Question 5

Lipopolysaccharide is an endotoxin created by some gram-negative bacteria that commonly causes fever in humans.
Lipopolysaccharide is what type of molecule?

A. Endogenous pyrogen.
B. Exogenous pyrogen.
C. Pathogenic pyrogen.
D. External pyrogen.

Answer 5

B. Exogenous pyrogen.

Question 6

Which of the following outcomes results from the activation of the complement system?
1) Elimination or destruction of microbes
2) Inflammation
3) Antibody production

A. 2 only
B. 1 and 2
C. 3 only
D. 1, 2, and 3

Answer 6

B. 1 and 2

Question 7

Varicella is an acute infectious disease commonly known as chicken pox. This disease is caused by a DNA virus that causes a moderate to severe body rash that stays dormant in the body after the rash. The virus can be reactivated years or decades later, creating a rash known as shingles. What type of infection occurs when the virus is dormant in the body for years?

A. Acute infection.
B. Chronic Infection.
C. Latent infection.
D. Transformation into a malignant cell.

Answer 7

C. Latent infection.