What is the major difference between retroviruses and common viruses?
a. Retroviruses cannot be killed by antiviral therapy, but common viruses can.
b. A retrovirus usually can cause disease over and over again in the same person.
c. A retrovirus carries the enzyme reverse transcriptase, and common viruses do not.
d. Retroviruses will respond to antibacterial drugs as well as to all the antiviral drugs.
ANS: C
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