Microbiology Gene responsible for semisynthetic penicillin resistance in Methicillin resistant Staph aureus (MRSA)? A Mec A B Mec B C Mec D D Mec C 💡 Explanation Gene responsible for semisynthetic penicillin resistance in Methicillin resistant Staph aureus (MRSA)? ✓ Correct Answer: A. Mec A