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Poly-A Tail
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AP Biology
APB.304 Poly-A Tail
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A eukaryotic mRNA has an intact 5-prime cap, but its poly-A tail is removed. Soon afterward, decapped RNA fragments increase. Which explanation best fits the sequence of events?
A
Loss of the tail directly creates a new DNA promoter at the cap.
B
Loss of the tail proves the cap is translated into a polypeptide.
C
Loss of the tail can promote instability that makes additional decay steps, such as decapping, more likely.
D
Loss of the tail permanently blocks all RNA decay enzymes.
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