The shape of the tobacco mosaic virus is:
Correct answer: B. Rod shape
- A. Spring shape
- B. Rod shape
- C. Comma shape
- D. Spherical shape
Explanation
This is factual recall from the chapter of acellular life which states that TMV is a helical virus that appears rod shaped so option B is most suitable.
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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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