NEET BIOLOGY

Detailed explanation-1: -This process of host cell takeover is known as “molecular hijacking.” When a virus replicates it has to build entire viral particles and it has to not only make the proteins that comprise the viral capsid (and enclose it with an envelope), but it must also replicate its genetic material.

Detailed explanation-2: -plural host cells. : a living cell invaded by or capable of being invaded by an infectious agent (such as a bacterium or a virus) This drug integrates with the virus in a way that prevents it from attaching to host cells, and prevents viral replication of cells already infected.

Detailed explanation-3: -How viruses travel through the body. Once a virus gets into a host’s body, it travels along the surfaces of cells until its proteins begin to bind with receptors on the cells. The virus and the cells then fuse, allowing the DNA or RNA inside the virus to enter the cells, where it begins to reproduce.

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).

Detailed explanation-5: -There are two general mechanisms of host cell invasion, induced endocytosis and active penetration. Furthermore, fungi can traverse epithelial or endothelial cell barriers either by proteolytic degradation of intercellular tight junctions or via a Trojan horse mechanism in which they are transported by leukocytes.