Multiple choice

Which of the following is a polyhedral virus?

  1. Polio virus

  2. TMV

  3. Vaccinia virus

  4. Bactreriophages

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A Correct answer
Explanation

Polio virus is a well-studied example of a polyhedral virus with icosahedral symmetry (approximately 30nm diameter, 60 structural subunits). TMV (Tobacco Mosaic Virus) is rod-shaped (helical). Vaccinia is a complex brick-shaped virus. Bacteriophages have complex geometric shapes but are typically described as having a head-tail structure.

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