Which statement is least essential in defining a retrovirus?
A)It may insert in many places in the host genome. B)It contains the enzyme reverse transcriptase. C)It contains an enzyme to carry out the transcription of RNA to DNA. D)It contains a genome of RNA. E)Viral DNA remains in the host genomE.
Which of these is the most accurate description of a virus?
A)a noncellular organism B)a type of bacteria C)a member of the Kingdom Virusae D)a cell at the boundary between living and nonliving things E)a chemical complex of RNA or DNA protected by protein
If you were a biologist studying how an RNA virus such as HIV can attack and infect a human cell which contains DNA,you would be studying which of the following enzymes?