Which of the following statement is not true for retrovirus?

DNA is not present any stage in the life cycle of retroviruses

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Retroviruses carry gene for RNA dependent DNA polymerase

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The genetic material in mature retroviruses is RNA

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Retroviruses are causative agents for certain kinds of cancer in man

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Solution

The correct option is A DNA is not present any stage in the life cycle of retroviruses
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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