The promoter of gene A has histones that are acetylated on lysine 27 of histone H3, and the promoter of gene B has histones that are methylated on lysine 4 of histone H3. Which gene is being actively transcribed?
A) gene A, because histone acetylation is associated with gene expression
B) gene A, because histone acetylation is associated with gene silencing
C) gene B, because histone methylation is associated with gene expression
D) gene B, because histone acetylation is associated with gene silencing
E) Both genes are actively transcribed because both of those marks are associated with
gene expression.
