Multiple Choice
Clostridium difficile-associated diarrhea is usually preceded by which of the following?
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1. Introduction to Microbiology
Introduction to Bacteria
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Which enzyme is responsible for attacking the cell wall of some Gram-positive bacteria?
A
Catalase
B
RNA ligase
C
DNA polymerase
D
Lysozyme
Verified step by step guidance1
Understand the structure of Gram-positive bacteria, which have a thick peptidoglycan layer in their cell wall.
Recall that enzymes targeting bacterial cell walls typically act on peptidoglycan to break down this protective barrier.
Identify lysozyme as an enzyme that hydrolyzes the bonds in peptidoglycan, thereby attacking the cell wall of Gram-positive bacteria.
Recognize that catalase breaks down hydrogen peroxide, RNA ligase joins RNA strands, and DNA polymerase synthesizes DNA, so these do not target the cell wall.
Conclude that lysozyme is the enzyme responsible for attacking the cell wall of some Gram-positive bacteria.
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