Characteristic features of Viruses
• Presence of nucleic acid and protein.
• Capable of mutation
• Ability to multiply within living cells.
• Able to infect and cause diseases in living beings.
• Show irritability.
• Host –specific
• Can be crystallized.
• Absence of metabolism.
• Inactive outside the host.
• Do not show functional autonomy.
• Energy producing enzyme system is absent.