1- DNA methylation of cytosine residues
a) initiates the acetylation of histones.
b) may be a mechanism of epigenic inheritance when methylation patterns are repeated in daughter cells. c) occurs in the promoter region and enhances binding of RNA polymerase.
d) is a signal for proteasomes to degrade a protein.
e) may be related to the transformation of proto-oncogenes to oncogenes.
2- A(n) ________ element is next to the gene being transcribed on the same chromosome.
a) cis-acting
b) enhancer
c) nucleosome
d) trans-acting
e) bro-acting