Why are ribonucleases that digest mature messenger RNA a necessary part of protein synthesis?
A)These enzymes prevent overexpression of critical proteins.
B)Without ribonucleases, messenger RNA could leave one cell type and lead to excessive protein synthesis in a different cell type.
C)When ribonucleases degrade RNA, the degradation products are recycled, making protein synthesis more energy efficient.
D)The activity of these enzymes promotes increased translation of individual messenger RNAs so that fewer RNA molecules are needed for protein production.

Question

Quizplus · Accepted Answer

Once in the cytoplasm, mRNA molecules have a very short life span, only seconds, before they are degraded by enzymes known as ribonucleases (RNases). This rapid degradation of mRNA is important in preventing an inadvertent overproduction of specific proteins. The idea is to make just enough active protein as is needed at that time and no extra. This makes protein synthesis less wasteful and more efficient. It also prevents too much of a specific protein from being present and exerting effects that are not needed.

Why Are Ribonucleases That Digest Mature Messenger RNA a Necessary