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)the binding of RNA polymerase to transcription factors

Question

Quizplus · Accepted Answer

Post-transcriptional control refers to the regulation of gene expression after transcription has occurred but before the functional protein is made. The removal of introns and alternative splicing of exons is an example of post-transcriptional control because it can result in different mRNA molecules being produced from the same gene, leading to the production of different proteins with different functions. The addition of methyl groups to cytosine bases of DNA and the binding of transcription factors to a promoter are examples of transcriptional control, which occurs before transcription of the mRNA molecule. The binding of RNA polymerase to transcription factors is also an example of transcriptional control.

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