IMMUNOLOGY

Detailed explanation-1: -In the lytic cycle, the virus attaches to the host cell and injects its DNA. Using the host’s cellular metabolism, the viral DNA begins to replicate and form proteins. Then fully formed viruses assemble. These viruses break, or lyse, the cell and spread to other cells to continue the cycle.

Detailed explanation-2: -A virus is a tiny, infectious particle that can reproduce only by infecting a host cell. Viruses “commandeer” the host cell and use its resources to make more viruses, basically reprogramming it to become a virus factory. Because they can’t reproduce by themselves (without a host), viruses are not considered living.

Detailed explanation-3: -To enter the cell, a virus floats up to, or lands on a cell, then attaches to a receptor. Receptors are proteins on the surface of cells that act like locks. They will only fit a specific key. The sneaky virus has a copy of that key.

Detailed explanation-4: -The virus life cycle could be divided into six steps: attachment, penetration, uncoating, gene expression and replication, assembly, and release.

Detailed explanation-5: -Viruses need to invade a host cell because viruses don’t have the capability to reproduce, so they replicate themselves inside the host cell.