EVERYDAY SCIENCE

Detailed explanation-1: -A virus is made up of a DNA or RNA genome inside a protein shell called a capsid.

Detailed explanation-2: -Virus particles contain the viral genome packaged in a protein coat called the capsid. For some viruses, the capsid is surrounded by lipid bilayer that contains viral proteins, usually including the proteins that enable the virus to bind to the host cells.

Detailed explanation-3: -Each virus also possesses a virus attachment protein embedded in its outer-most layer. This will be found in the capsid, in the case of a naked virus, or the envelope, in the case of an enveloped virus.

Detailed explanation-4: -Viral Structure. In the simpler viruses the virion consists of a single molecule of nucleic acid surrounded by a protein coat, the capsid; the capsid and its enclosed nucleic acid together constitute the nucleocapsid.

Detailed explanation-5: -The nucleic acid-associated protein, called nucleoprotein, together with the genome, forms the nucleocapsid.