Give a brief account of viruses with respect to their structure and nature of genetic material. Also name four common viral diseases. | NCERT solution | Class 12 Biology | Unit-2 Biological Classification

Q.11:- Give a brief account of viruses with respect to their structure and nature of genetic material. Also name four common viral diseases.

 

Answer

Viruses have a protein capsule and genetic materials inside the capsule. These genetic material become active once they are inside the nucleus of a host cell. They start replicating themselves and in turn spreading the disease.
Generally viruses that infect plants have single stranded RNA. Viruses infecting animals have double stranded RNA or DNA. Viruses which infect bacteria have double stranded DNA.

A.I.D.S, small pox, mumps, and influenza are some common examples of viral diseases.