AP Biologyeasymcq1 pt
The 5′ cap and poly-A tail function mainly to
A.protect mRNA from degradation and aid translation
B.code for amino acids
C.remove introns
D.start DNA replication
Explanation
Core Concept
The cap guides ribosome binding, and the tail stabilizes the transcript — together extending mRNA's cytoplasmic lifetime.
Correct Answer
Aprotect mRNA from degradation and aid translation
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