Which Statement About MRNA Stability Is TRUE

question 1

Multiple Choice

Which statement about mRNA stability is TRUE?

• A) Degradation always proceeds in the 5' to 3' direction.
• B) Degradation of mRNA by polynucleotide phosphorylase yields 5'-nucleoside monophosphates.
• C) In general, bacterial mRNAs have longer half-lives than do eukaryotic mRNAs.
• D) Rates of mRNA degradation are always at least 10-fold slower than rates of mRNA synthesis.
• E) Secondary structure in mRNA (hairpins, for example) slows the rate of degradation.

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