NEET BIOLOGY

Detailed explanation-1: -Viruses are either enveloped or non-enveloped. Enveloped viruses contain the viral genome and core proteins wrapped within one or more membranes. These membranes are acquired from the host cell during virus assembly and budding [166].

Detailed explanation-2: -Some examples of non-enveloped viruses are norovirus, enterovirus, adenovirus, and rhinovirus.

Detailed explanation-3: -The virus capsid functions to protect the nucleic acid from the environment, and some viruses surround their capsid with a membrane envelope. Most viruses have icosahedral or helical capsid structure, although a few have complex virion architecture.

Detailed explanation-4: -Many viruses are surrounded by a continuous bilayer membrane studded with viral proteins. Its purpose is to protect the genome-containing virus nucleocapsid from damage, and to facilitate entry of the nucleocapsid into a host cell.