Discussion
The cell walls of many gram positive bacteria can be easily destroyed by the enzyme known as
Answer: B
Correct answer: lysozyme
Lysozyme hydrolyses the β-1,4 bond between NAM and NAG in peptidoglycan. A gram-positive cell, whose wall is mostly peptidoglycan and exposed to the outside, is destroyed by it readily; a gram-negative one is protected by its outer membrane. Lysozyme is present in tears, saliva and egg white as a first line of defence.
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