Question

How can one primary mRNA result in several polypeptrides with different amino acid sequences? Post-translational modification...

How can one primary mRNA result in several polypeptrides with different amino acid sequences?

Post-translational modification such as phosphorylation.

Pre-translational modification such as phosphorylation.

Modification of the mature mRNA by phosphorylation

Alternative splicing of exons and introns.

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Answer #1

"Alternative splicing of exons and introns." is the only correct answer to the question.

Splicing is the one of the mRNA maturation processes present in eukaryotic cell. It involves removal of introns (non-coding parts) and joining of exons (coding parts) to produce final mRNA. Alternate splicing involves the splicing of mRNA in a manner which produces different final sequence each time. Splicing directly acts on the change in sequence of mRNA while other process like phosphorylation can only add phosphate to particular nucleotide or amino acid.

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