Transcription and RNA Processing

AP Biology· difficulty 3/5

The poly-A tail at the 3' end of eukaryotic mRNA functions to

A
$Stabilize the mRNA, aid export from nucleus, and promote translation$
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B
$Bind the small ribosomal subunit, initiate scanning, and start translation$
C
$Encode the signal peptide, direct mRNA to the ER, and trigger translation$
D
$Recruit splicing factors, remove introns, and finalize the mature transcript$

Explanation

Without the poly-A tail, mRNA is rapidly degraded.

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