Inteinsـــــــــــــــــــــــــ

Question

Inteinsـــــــــــــــــــــــــ .
A)are protein self-splicing sequences
B)are portions of mRNA that are spliced out of the primary transcript
C)are never translated
D)are protein sequences that are part of functional proteins

Accepted Answer

Inteins are protein self-splicing sequences that can excise themselves from within a larger protein sequence through catalytic activity. The remaining portions of the protein, called exteins, can then be joined together to form a functional protein. Inteins are not portions of mRNA and can be translated when part of a larger protein sequence.