Which of the following is an example of post-transcriptional control of gene expression?
A) the addition of methyl groups to cytosine bases of DNA
B) the binding of transcription factors to a promoter
C) the removal of introns and alternative splicing of exons
D) gene amplification contributing to cancer
E) the folding of DNA to form heterochromatin

Question

Quizplus · Accepted Answer

Post-transcriptional control of gene expression refers to the regulation of process that happens after transcription has already occurred. The removal of introns and alternative splicing of exons is an example of post-transcriptional control because it determines which mRNA molecules are ultimately translated into protein. The other options listed are examples of transcriptional control, which occurs before transcription starts.

Which of the Following Is an Example of Post-Transcriptional Control