Question

A geneticist discovers that two different proteins are encoded by the same gene. One protein has 56 amino acids, and the other has 82 amino acids. Which of the statements are possible explanations for how the same gene can encode both of these proteins?

1-The same gene encodes both proteins by using different combinations of introns in the pre‑mRNA via alternative splicing.

2-The same gene encodes both proteins by generating a poly(A) tail on the pre‑mRNA.

3-The same gene encodes both proteins by using multiple 3′ cleavage sites in the pre‑mRNA.

4-The same gene encodes both proteins by using different combinations of exons in the pre‑mRNA via alternative splicing

Answer 1

Both answer 3 and 4 could be correct explaination

3rd statement- by using multiple 3' cleavage site means in one time full length of exons combination could be used for protein synthesis while in 2nd time one of exon is cleaved from 3 site so that last few amino acid does not synthesis abd a new protein formed

4th statement suggest that duribg post transcriptional midification, introns are removed abd exons are ligated tp form continous coding region, during this ligation process of exon, exon ppsition can be shifted to form alternate codibg region which forn different protein.

hope its clear..thanks