Which of the following is an example of an epigenetic change?
A) A mutation that changes adenine to guanine
B) Methylation of a cytosine
C) The binding of a transcription factor to a sequence of DNA
D) The mutation of an activator binding site
E) The mutation of a repressor binding site

Question

Quizplus · Accepted Answer

Methylation of a cytosine is an example of an epigenetic change because it alters gene expression without changing the DNA sequence itself. Methylation can turn genes "off" by blocking the binding of transcription factors, thus inhibiting gene expression. The other options involve changes to the DNA sequence itself, which are considered genetic rather than epigenetic changes.

Which of the Following Is an Example of an Epigenetic