NEET BIOLOGY

Detailed explanation-1: -The virus’s genome is uncoated from the protein and injected into the host cell. Then the viral genome hijacks the host cell’s machinery, forcing it to replicate the viral genome and produce viral proteins to make new capsids. Next, the viral particles are assembled into new viruses.

Detailed explanation-2: -Numerous viruses, especially enveloped viruses, use and modify compartments of the secretory pathway to promote their replication, assembly and cell egression by hijacking the host cell machinery.

Detailed explanation-3: -Viruses clearly rely on host cell machinery to propagate-they promote anabolism for generation of macromolecules needed for virion replication and assembly.

Detailed explanation-4: -Viruses initially stick to cell membranes through interactions unrelated to fusion proteins. The virus surfs along the fluid surface of the cell and eventually the viral fusion proteins bind to receptor molecules on the cell membrane (4). If only binding occurred, the two membranes would remain distinct.

Detailed explanation-5: -Although viruses encode many of the functions that are required for viral replication, they are completely reliant on the protein synthesis machinery that is present in their host cells.