NEET BIOLOGY

Detailed explanation-1: -Viruses infect all forms of organisms including bacteria, archaea, fungi, plants, and animals. Living things grow, metabolize, and reproduce. Viruses replicate, but to do so, they are entirely dependent on their host cells.

Detailed explanation-2: -Viruses cannot replicate on their own, but rather depend on their host cell’s protein synthesis pathways to reproduce. This typically occurs by the virus inserting its genetic material in host cells, co-opting the proteins to create viral replicates, until the cell bursts from the high volume of new viral particles.

Detailed explanation-3: -A virus is an infectious agent that can only replicate within a host organism. Viruses can infect a variety of living organisms, including bacteria, plants, and animals.

Detailed explanation-4: -A virus needs a living cell in order to reproduce. The living cell in which the virus reproduces is called a host cell.

Detailed explanation-5: -The synthesis of viral transcripts is mediated by a viral RNA-dependent RNA polymerase (transcriptase) which has a number of enzymatic activities.