Which of the following has a morphology of a helical virus?
Correct answer: A. TMV
- A. TMV
- B. T4 Phage
- C. Poxvirus
- D. Herpes virus
Explanation
Tobacco mosaic virus (TMV) is a well-studied plant virus that belongs to the Tobamovirus genus. It is characterized by its rod-like or filamentous appearance. The structure of TMV consists of a long, cylindrical particle with a helical symmetry. The viral particle is made up of a single type of protein subunit, arranged in a helical fashion around the RNA genome. The rod-shaped appearance is due to the helical arrangement of these protein subunits.
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About Viruses
Viruses are acellular infectious particles made of genetic material enclosed by a protein capsid, sometimes with a lipid envelope. Their replication depends on a host cell and may follow lytic or lysogenic cycles, so viral structure and reproduction differ fundamentally from those of cellular organisms such as bacteria.
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