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Question
Which of the following statement is not true for retrovirus?
Options:
A .  DNA is not present any stage in the life cycle of retroviruses
B .  Retroviruses carry gene for RNA dependent DNA polymerase
C .  The genetic material in mature retroviruses is RNA
D .  Retroviruses are causative agents for certain kinds of cancer in man
Answer: Option A
:
A
Retroviruses are so named because they contain the enzyme reverse transcriptase or RNA-dependent DNA polymerase (RdRP). The genetic material of these viruses is RNA. From their genetic RNA they produce DNA using RdRP; e.g., Rous sarcoma virus.

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