NEET BIOLOGY

Detailed explanation-1: -Complete answer: All viruses are obligate parasites, i.e., they lack metabolic machinery of their own to generate energy or to synthesize proteins, hence they depend on the host cells to carry out these vital functions.

Detailed explanation-2: -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-3: -Antibiotics do not acts against virus as they are made up of polymorphic protein coat. Viruses have different type of symmetry like icosahedral and helical. So, the correct answer is option B.

Detailed explanation-4: -A virus is an infectious microbe consisting of a segment of nucleic acid (either DNA or RNA) surrounded by a protein coat. A virus cannot replicate alone; instead, it must infect cells and use components of the host cell to make copies of itself.