Unit II Flashcards
1
Q
Negative control
A
When a regulatory protein called a repressor binds to DNA and shuts down transcription.
2
Q
Differential gene expression
A
When cells with the genome express different sets of genes due to internal signaling.
3
Q
Acetylation
A
The addition of acetyl groups to a condensed chromatin in order to de-condense it.
4
Q
Chromatin-remodeling complexes
A
Macromolecular machines made of proteins which harness the energy in ATP to reshape chromatin.
5
Q
Epigenetic inheritance
A
Any mechanism of inheritance not caused by DNA.
6
Q
DNA methylization
A
DNA methyltransferases add methyl groups to cytosine residues in DNA, which are then recognized by proteins which trigger chromatin condensation.
7
Q
Amphipathic
A
Substances that contain both hydrophilic and hydrophilic regions.
