EVERYDAY SCIENCE

Detailed explanation-1: -Viruses are obligate parasites in that they can only replicate within a living host cell. Thus the science of virology is largely dependent upon the requirement to be able to grow and propagate such host cells.

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: -Viruses use the machinery of the host cells to reproduce. They do not have cell organelles such as Golgi complex, mitochondria, lysosomes, ribosomes etc. hence, they cannot reproduce or live separately. Therefore they are called obligatory intercellular parasites.

Detailed explanation-5: -Obligate parasites are organisms that require a host for the completion of their life cycle. The obligate parasites cannot synthesise their food, instead, they are dependent on the host for food. Bacteria, plants, and fungi all have examples of obligate parasites. All viruses are known to be obligate parasites.