Question

Name two ways a virus can make multiple proteins from one gene and describe the mechanism for both?

Answer 1

When viruses are of two different parent strain coinfect the same host cell and generate virus progeny during replication which have some genes from both parents , then virus recombination occurs.

A post transcriptional modification in which a single gene could code for multiple proteins .This is called Gene Splicing.

An important source of protein diversity is gene splicing. It is done in eukaryotes, prior to m-RNA translation by the differential inclusion or exclusion of regions of pre m-RNA.This is how splicing is done.

Viruses can't carry out their life sustaining process or reproduce without host cell. They can't synthesize protein because they lack ribosomes . They must use the ribosomes of their host cell to translate viral messenger RNA into viral protein.

Two method of viral replication are as following -

It includes 6steps.

1)Attachment

2)Penetration

3)Uncoating

4)Replication

5)Assembly

6)Release

The viruses attach itself to the host cells during attachment and penetration and injects it's genetic material into it.