NEET BIOLOGY

Detailed explanation-1: -Association of organisms which benefits one of the partners at the expense of other is called as parasitism. The virus is an acellular organism that harms it host by using host’s metabolic machinery for its own replication. Viruses are the obligate parasite as they can not survive outside the host cell.

Detailed explanation-2: -Viruses are small obligate intracellular parasites, which by definition contain either a RNA or DNA genome surrounded by a protective, virus-coded protein coat.

Detailed explanation-3: -viruses. All viruses are obligate parasites; that is, they lack metabolic machinery of their own to generate energy or to synthesize proteins, so they depend on host cells to carry out these vital functions.

Detailed explanation-4: -Parasite: Any organism that lives in or on another organism without benefiting the host organism; commonly refers to pathogens, most commonly in reference to protozoans and helminths.

Detailed explanation-5: -Parasitic viruses, also known as file viruses, spread by attaching themselves to programs. When you start a program infected with a parasitic virus, the virus code is run. To hide itself, the virus then passes control back to the original program.