Tobacco mosaic virus is__________?
Correct answer: B. Rod Shaped
- A. Spherical
- B. Rod Shaped
- C. Tadpole like
- D. Hexagonal
Explanation
Tobacco mosaic virus has a rigid helical capsid that gives the virion a characteristic rod-shaped form. The spherical and hexagonal choices refer to other possible viral shapes, while the tadpole-like form is typical of many bacteriophages.
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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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