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The tobacco mosaic virus measures 300 nm in length and has a diameter of 20 nm. Which of the following statements is accurate?

1. The cauliflower mosaic virus possesses double-stranded DNA.
2. Viruses lack enzymes since they cannot transfer their genetic material between host cells.
3. Both of the above statements are correct.
4. Neither of the above statements is correct.

Correct answer: The cauliflower mosaic virus possesses double-stranded DNA.

Solution

Cauliflower mosaic virus contains double-stranded DNA, which is a unique feature among plant viruses. This makes option A correct.

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