Which of the following statements regarding regulation of prokaryotic gene expression is incorrect?
A) Accumulation of an end product of a biosynthetic pathway may result in the inhibition of the first enzyme in the pathway.
B) Different regions of an mRNA molecule may degrade at different rates.
C) E. coli cells devote a larger share of energy to the production of ribosomes under starvation conditions than in conditions favorable to growth.
D) Hairpins in the mRNA molecule can decrease translation rates by impeding the migration of ribosomes.
E) Unequal efficiencies of translational initiation are known to occur at the ATG start codons of different genes.

Question

Quizplus · Accepted Answer

E. coli cells actually devote a larger share of energy to the production of ribosomes under conditions favorable to growth than under starvation conditions. In favorable conditions, there are abundant nutrients and energy available to produce many ribosomes, which can in turn synthesize proteins and support cell growth. In contrast, under starvation conditions, E. coli cells may conserve energy and resources by decreasing ribosome production, slowing down growth, and entering a dormant state.

Which of the Following Statements Regarding Regulation of Prokaryotic Gene