MCQ Practice

Gram-positive bacteria are generally resistant to complement-mediated lysis because

A

Thick peptidoglycan layer prevents insertion of membrane attack complex into the inner membrane

B

Gram-positive bacteria import the membrane attack complex and inactivate it

C

Membrane attack complex is degraded by the proteases produced by the Gram-positive bacteria

D

Gram-positive bacteria cannot activate the complement pathway

Correct Answer: A