Some of the drugs used to treat hiv patients are competitive inhibitors of the hiv reverse transcriptase enzyme. unfortunately, the high mutation rate of hiv means that the virus rapidly acquires mutations with amino acid changes that make them resistant to these competitive inhibitors. where in the reverse transcriptase enzyme would such amino acid changes most likely occur in drug-resistant viruses?

Which is an advantage of having memory cells when a pathogen is encountered for a second time. a) the memory cells are what proliferate into clones of cells in response to the binding of an antigen. b) memory cells are vital to the primary immune response in that they immediately recognize pathogens even at the first encounter. c) memory cells are essentially effector cells that are short lived and attack antigens even without having a receptor specific to that antigen. d) it ensures that more lymphocytes with a receptor specific to a particular antigen will be present than in a host that had never encountered that pathogen.