(MCQ from UHS MDCAT 2024)
Q: Example of viruses having a polyhedral capsid that is with 252 capsomeres is:
A. Adenovirus
B. Tobacco Mosaic Virus
C. Influenza virus
D. Bacteriophage
Correct Answer: A. Adenovirus
Explanation:
- Adenovirus is an example of a virus with a polyhedral (icosahedral) capsid composed of exactly 252 capsomeres. It is a non-enveloped DNA virus and its capsid shape helps in its stability and ability to infect host cells efficiently.
- Tobacco Mosaic Virus (TMV) → has a helical capsid, not polyhedral.
- Influenza virus → has a spherical/enveloped capsid with helical symmetry inside.
- Bacteriophage → often has a complex structure (head-tail), not a pure polyhedral capsid.
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