Question

Which of the following statements about mRNA half-life is false?

(a) The half life of mRNAs produced from different genes will vary more
(b) the half-life of most eukaryotic-cell mRNAs is more than 24 hours.
(c) The half-life of most bacterial mRNA is shorter than the half-life of a typical eukaryotic mRNA
(d) The 5 and 3 untranslated regions of an mRNA often contain specific sequences that determine the lifetime of the mRNA molecule

Answer 1

The false statement is (b) the half-life of most eukaryotic-cell mRNAs is more than 24 hours. In reality, eukaryotic mRNAs last for several hours, whereas bacterial mRNA has a shorter half-life.

Step-by-step explanation:

The false statement about mRNA half-life is (b) the half-life of most eukaryotic-cell mRNAs is more than 24 hours. In reality, eukaryotic mRNAs last for several hours, whereas bacterial mRNA has a shorter half-life. The half-life of most bacterial mRNA is shorter than the half-life of a typical eukaryotic mRNA. Additionally, (d) the 5' and 3' untranslated regions of an mRNA often contain specific sequences that determine the lifetime of the mRNA molecule.