Which Situation Would Allow Gene Expression to Continue

Question

Which situation would allow gene expression to continue?
A) X-chromosome inactivation
B) an increase in proteases
C) an increase in repressor proteins
D) a reduction in nucleases

Accepted Answer

A reduction in nucleases would allow for the stability of mRNA, which would allow gene expression to continue. Nucleases are enzymes that degrade RNA, so a reduction in their activity or amount would prevent degradation of mRNA and allow for continued gene expression. A is incorrect because X-chromosome inactivation would result in the silencing of one of the two X chromosomes in females, leading to reduced expression of genes on the silenced chromosome. B is incorrect because an increase in proteases would lead to the degradation of proteins and could lead to a decrease in gene expression. C is incorrect because an increase in repressor proteins would bind to DNA and prevent gene expression.