Question

Through which process do scientists believe MRSA, or methicillin-resistant Staphylococcus aureus, most likely developed?

A. Natural selection occurred in mutated bacterial DNA.

B.A virus infected the bacteria, changing its genetic makeup.

C.Prokaryotic bacteria evolved into eukaryotic bacteria.

D.Circular chromosomes in bacteria became converted to linear chromosomes.

Answer 1

ANSWER:-

MRSA is responsible for several difficult-to-treat infections in humans. MRSA is any strain of S. aureus that has developed, through horizontal gene transfer and natural selection, multiple drug resistance to beta-lactam antibiotics. β-lactam antibiotics are a broad spectrum group which includes some penams – penicillin derivatives such as methicillin and oxacillin, and cephems such as the cephalosporins.Strains unable to resist these antibiotics are classified as methicillin-susceptible S. aureus, or MSSA.

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