The molecules that can block genetic expression are called
A) genomes.
B) chromosomes.
C) stress hormones.
D) epigenetic marks.

Question

Quizplus · Accepted Answer

Epigenetic marks are chemical modifications made to DNA that can affect gene expression without changing the actual DNA sequence. These marks can include methylation or acetylation of DNA, which can either activate or silence gene expression. Therefore, molecules that can block genetic expression are referred to as epigenetic marks. Genomes and chromosomes refer to DNA itself, while stress hormones may affect gene expression indirectly via signaling pathways.

The Molecules That Can Block Genetic Expression Are Called