B, methicillin-resistant Staphylococcus aureus belongs to a kind of bacteria, its cell structure contains ribosomes, which can independently synthesize protein. The virus has no cell structure, and the place where protein is synthesized is the ribosome of the host cell, B is right;
C, methicillin-resistant Staphylococcus aureus can divide and reproduce in human cells, while the virus can only reproduce in host cells, C error;
D the genetic material of Zika virus is RNA, while the genetic material of methicillin-resistant staphylococcus aureus is DNA. D is wrong.
Therefore, choose: B.