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Living characteristics of virus Non-living characteristics of virus

1. It is capable of multiplying inside a host cell (Plant or Animal cell)

It is an obligatory intracellular parasite.
It cannot multiply extracellularly, i.e. Outside the cell.
2. It is capable of causing diseases. Metabolic activity is absent.
3. It possesses nucleic acid (either DNA or RNA), proteins (Capsid) and Enzymes for replication Protoplasm is absent.
4. It has the ability to mutate. Crystallization of viruses is possible.