A Bacterium May Be Penicillin Resistant Due to All of the Following

Question

A bacterium may be penicillin resistant due to all of the following EXCEPT
A) a Gram-negative cell wall.
B) beta-lactase production.
C) a Gram-positive cell wall.
D) modified transpeptidases.
E) modified transglycosylases.

Accepted Answer

A Gram-positive cell wall is not a mechanism of penicillin resistance. Penicillin resistance typically arises from beta-lactamase production, modifications to penicillin-binding proteins (such as transpeptidases and transglycosylases), or the presence of a Gram-negative cell wall, which can prevent penicillin from reaching its target due to its outer membrane.