Correct Answer: Peptidoglycan and chitin
Subject: 2025
Explanation: • <b>Key Fact</b>: The tested concept is <b>Cell Wall Composition</b>.<br>• <b>Additional Info</b>: Remember the defining fact/rule and its common exam association.<br>• <b>Why the other options are wrong</b>: They refer to different facts or concepts.<br>• <b>Exam Trick</b>: Link the keyword directly to the defining fact.<br>• <b>Final Answer</b>: Peptidoglycan and chitin.