Ch 7

Question 1

All of the following are targets of currently used antibiotics EXCEPT
A) DNA synthesis.
B) biofilm formation.
C) transcription.
D) translation.

Answer 1

Biofilm formation

Question 2

Penicillins work by
A) activating autolytic enzymes.
B) blocking the transpeptidation reaction that crosslinks polysaccharide chains in
peptidoglycan.
C) stimulating autolysins to form holes in the plasma membrane.
D) All of these answer choices are true

Answer 2

All are true

Question 3

Why is the presence of a cell wall in bacteria significant from a clinical standpoint?

Answer 3

Animal cells do not have cell walls, so antibiotics that target cell walls can selectively
destroy invading microorganisms

Question 4

Which of the following is NOT a target of antibiotics that are used to treat bacterial infectious
disease?
A) Bacterial cell walls
B) Ribosomes
C) Cell membranes
D) Flagella
E) DNA gyrase

Answer 4

Flagella

Question 5

Antibiotic resistance can develop in a bacterium as a result of spontaneous mutation.

Answer 5

True

Question 6

Natural antibiotics are produced by all bacterial genera.

Answer 6

False