Ch. 17 Gene Regulation Flashcards Preview

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Flashcards in Ch. 17 Gene Regulation Deck (10)
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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
  1. transcriptional regulation
  2. mRNA processing
  3. regulation of the mature mRNA
  4. Translational
  5. 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