helical capsid, icosahedral capsid and polyhedron capsid.
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The protein coat surrounding the nucleic acid of a virus is called the capsid. These are broadly classified according to their structures. Helical (cylindrical) and icosahedral (spherical) are the most common types.
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This coat is called a capsid. Sometimes these have a lipid
envelope.
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Outer layer of a virus is called a capsid. It is the shell of
protein which protects the nucleic acid, the brain of a virus.
Capsid is composed of individual morphological units called
capsomers.