Question

In some viruses, RNA is present instead of DNA indicating that ______.

Options

• their nucleic acid must combine with host DNA before replication

• they cannot replicate

• there is no hereditary information

• RNA can act to transfer heredity

Answer 1

In some viruses, RNA is present instead of DNA indicating that RNA can act to transfer heredity.

Explanation:

Infectious nucleoproteins are what viruses are. The fundamental function of a virion is to transmit the virus's DNA or RNA genome into the host cell so that the genome can be produced by the host cell. A virus's genetic material is either DNA or RNA; never both are present in the same virus. Viruses are thus:

1. Hepatitis B - Double-stranded DNA (ds DNA)
2. Coliphage - Single-stranded DNA (ss DNA)
3.   Reo virus, wound Tumor virus - double-stranded RNA (ds RNA)
4. Tobacco mosaic virus (TMV) - Single-stranded RNA (ss RNA)