The Human Gene Encoding for Calcitonin Contains Six Exons and Five

question 40

Multiple Choice

The human gene encoding for calcitonin contains six exons and five introns and is located on chromosome 11.The pre-mRNA transcript from this gene can generate either calcitonin or calcitonin gene related peptide (CGRP) in a tissue-specific manner.Calcitonin produced from the thyroid gland is 32 amino acids long and functions to regulate the calcium while CGRP, which contains 37 amino acids, is produced by the brain cells and involved in transmission of pain.Which of the following processes makes production of two functionally and structurally different proteins from the same gene possible?

• A)Self-spicing introns
• B)Differential transcription
• C)Alternative replication
• D)5' capping and polyadenylation
• E)Alternative RNA processing

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