A) Cyanophage
B) Herpes virus
C) Leuko virus
D) Polio virus
Correct Answer: C
Solution :
We all know that all cells have double - stranded DNA as their genetic material. But, in contrast, all viruses possess either DNA or RNA as their genetic material, and it can be either single-stranded or double-stranded. However, there is a third group of viruses that use both DNA and RNA as their genetic material but at different stages of their reproductive cycle. This third group is examplified by retroviruses which contain RNA as genetic material but replicate through a DNA intermediate, and hepadnavi ruses (human hepatitis-B virus) which contains DNA as in replication genetic material but has an RNA intermediate.
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