Answers
Question 1
3..57 pts
How do penicillin’s and cephalosporins work?
By inhibition of protein synthesis
By inhibiting bacterial protein
synthesis Correct!
By weakening the cell wall and promoting lysis and death
By increasing permeability of cell membranes, increasing leakage of
intracellular materials
Question 2
3..57 pts
Bactericidal drugs
are:
Correct!
are directly lethal to bacteria at achievable concentrations
are nonlethal to bacteria at achievable concentrations
can slow bacterial growth but do not cause death
, are directly lethal to bacteria if minimum amount is given
Question 3
3..57 pts
Why are narrow spectrum antibiotics preferred over broad spectrum
antibiotics?
Narrow spectrum antibiotics are more powerful
Broad spectrum antibiotics are weaker
Narrow spectrum antibiotics cover all gram
negative bacteria Correct!
Broad spectrum antibiotics do the most to facilitate emergence of
resistance
Question 4
3..57 pts
How does bacterial resistance develop with penicillins? Check all that
apply.
bacteria cross the protective barrier of
penicillin’s Correct!
production of penicillin binding proteins that have low affinity
for penicillins Correct!
inability of penicillins to reach their target
production of penicillin binding proteins that have high affinity
for penicillins Correct!