A nurse is discussing methicillin-resistant Staphylococcus aureus (MRSA) with a group of nursing students. Which statement by a student correctly identifies the basis for MRSA resistance?
1) MRSA bacteria have developed PBPs with a low affinity for penicillins.
2) MRSA bacteria produce penicillinases that render penicillin ineffective.
3) MRSA occurs because of host resistance to penicillins.
4) MRSA strains replicate faster than other Staphylococcus aureus strains.