The expression of some genes can be regulated in part by the pattern of RNA splicing. This is an example of
A) DNA methylation.
B) transcriptional regulation.
C) catalytic RNA activity.
D) posttranscriptional control.
E) the endosymbiotic theory.

Question

Quizplus · Accepted Answer

RNA splicing occurs after transcription and is a process of removing introns and joining exons to form mature mRNA. The pattern of RNA splicing can affect the final mRNA product and ultimately the expression of the corresponding gene, making it an example of posttranscriptional control. DNA methylation and transcriptional regulation occur prior to transcription, while catalytic RNA activity refers to RNA molecules that act as enzymes, which is not relevant to this question. The endosymbiotic theory is a hypothesis explaining the origin of eukaryotic cells that is not relevant to gene expression.

The Expression of Some Genes Can Be Regulated in Part