Question:
Which one of the following is a double-stranded DNA isometric virus?
Which one of the following is a double-stranded DNA isometric virus?
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Cauliflower mosaic virus (CaMV) is the classic plant pararetrovirus with a circular double-stranded DNA genome and isometric particle shape.
Updated On: Sep 15, 2026
- Cauliflower mosaic virus
- Tomato mosaic virus
- Tomato leaf curl virus
- Potato mosaic virus
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Plant viruses are classified by their nucleic acid genome type (ssRNA, dsRNA, ssDNA, dsDNA) and virion morphology.
Step 2: Detailed Explanation:
Cauliflower mosaic virus (CaMV, genus Caulimovirus) is a pararetrovirus possessing a circular double-stranded DNA (dsDNA) genome encapsulated in an isometric/icosahedral virion ($T=7$ symmetry, $\approx 50\,\text{nm}$ diameter).
Tomato mosaic virus and Potato virus X/Y are single-stranded RNA (ssRNA) viruses, and Tomato leaf curl virus is a single-stranded DNA (ssDNA) geminivirus.
Step 3: Final Answer:
Therefore, Cauliflower mosaic virus is the double-stranded DNA isometric virus.
Plant viruses are classified by their nucleic acid genome type (ssRNA, dsRNA, ssDNA, dsDNA) and virion morphology.
Step 2: Detailed Explanation:
Cauliflower mosaic virus (CaMV, genus Caulimovirus) is a pararetrovirus possessing a circular double-stranded DNA (dsDNA) genome encapsulated in an isometric/icosahedral virion ($T=7$ symmetry, $\approx 50\,\text{nm}$ diameter).
Tomato mosaic virus and Potato virus X/Y are single-stranded RNA (ssRNA) viruses, and Tomato leaf curl virus is a single-stranded DNA (ssDNA) geminivirus.
Step 3: Final Answer:
Therefore, Cauliflower mosaic virus is the double-stranded DNA isometric virus.
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