AP Bio Chapter 15: Regulation of Gene Expression

Activator - Protein that binds to an enhancer and stimulates transcription of gene, have two domains Allolactose - The inducer for the lac operon, formed from lactose that enters the cell Alternative RNA Splicing - Different mRNA molecules are produced from the same primary transcript, depending on which RNA segments are treated as exons and which as introns Bound Activators - Facilitate a sequence of protein-protein interaction that result in transcription of a given gene By default the trp operon is... - On CAP/ positive gene regulation - when glucose levels increase, CAP detaches from the lac operon, and transcription proceeds at a very low rate, even if lactose is present cDNA - Complementary DNA Centromeric DNA - Copied into double-stranded RNA and then processed into siRNAs Chemical modifications to ___________ and _______ can influence chromatin structure and gene expression - histone proteins... DNA