Ch. 17 Gene Regulation Flashcards
1
Q
lac operon
A
most basic level of how we regulate a set of genes in response to environmental cues
2
Q
inducible promoter
A
lac operon
3
Q
what are some places of regulation of gene expression?
A
- transcriptional regulation
- mRNA processing
- regulation of the mature mRNA
- Translational
- Post translational
4
Q
euchromatin
A
open chromatin, lots of active transcription
5
Q
heterochromatin
A
tightly packed chromatin
6
Q
nucleosome
A
histones + DNA (core of 8 histones)
7
Q
chromatin remodeling
A
catalytic reaction by chromatin remodeling complexes
- shifting or removal of nucleosomes results in different DNA becoming accessible
- requires ATP hydrolysis
8
Q
DNA methylation
A
leads to inhibition of transcription
highly methylated DNA is “turned off”
methylase (enzyme that carries this out)
9
Q
imprinting
A
parent of origin effect of gene expression
10
Q
ICR
A
imprinting control region
-insulator that cannot function when methylated
