Because penicillin prevents peptidoglycan synthesis, it is more effective on ___ cells.August 19, 2022 AdminIn Biology Mcqs, Everyday Science MCQs Set-16Leave a Comment on Because penicillin prevents peptidoglycan synthesis, it is more effective on ___ cells. A. Gram Positive B. Gram Negative C. Acid Fast D. All of these Answer Correct Answer: A. Gram Positive