A) associating with regulatory sequences distant from the gene from which they were transcribed.
B) regulating the expression of the gene from which they were transcribed.
C) the association of nucleotides with the elongating RNA transcript.
D) physically associating with DNA polymerase.
E) regulating the activity of telomerase.

A) beta-galactosidase.
B) a random region of DNA.
C) the cis-acting regulatory DNA sequence.
D) X-gal.
E) the coding region of the gene being studied.

A) the DNA sequences that are important for regulating gene expression levels.
B) the effects on cell function of expression of heterologous proteins.
C) colorimetric assays.
D) protein-protein interactions.
E) Western blots.