Each capsomere of TMV contains amino acids, whose number is
A
185
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B
158
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C
518
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D
815
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Solution
The correct option is C 158 Tobacco mosaic virus (TMV) is a single-stranded RNA virus which infects the plants belonging to the family of Solanaceae. It is a rod-shaped virus, the capsid is made from the protein coat and the genetic material. There are protein subunits known as capsomeres. The genetic material is a single-stranded viral particle. The protein monomer units consists of 158 amino acids which are assembled into four main alpha-helices, joined by a prominent loop proximal to the axis of the virion.