turns genes off
repressible operon
turns genes on
inducible operon
where RNA polymerase binds
promoter
a protein degrading machine
proteosome
a death tag for unwanted proteins
ubuquitin
a protein that DNA wraps around
Histone Proteins
short segments that bind to mRNA, a death tag for mRNA
siRNA
occurs on histones and increases gene expression
Acetylation
light DNA(loose)
Euchromatin
dark DNA (tight)
heterochromatin
the time it takes proteins to digest a cell
degradation time
lipid molecules that send out signals to other cells when in the nucleus
steroids
a protein that blocks transcription
methylation
a protein that stimulates gene transcription
activators
proteins that start and regulate transcription of genes
transcription factors
proteins that take out introns
spliceosomes