Double stranded DNA plant virus is

Tobacco mosaic virus

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Turnip yellow mosaic virus

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Alfalfa mosaic virus

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Cauliflower mosaic virus

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Solution

The correct option is D Cauliflower mosaic virus
Cauliflower mosaic virus contains a circular double-stranded DNA molecule which is of about 8.0 kilobases. This DNA molecule contains nicks that result from the actions of RNase H during reverse transcription. After entering the host cell these single-stranded nicks in the viral DNA are repaired and forms a supercoiled molecule. So the correct answer is Cauliflower Mosaic Virus.

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