Gene Expression Flashcards
1
Q
Whats a promoter?
A
A DNA sequence located before the structural gene that RNA polymerase binds to
2
Q
Whats an operator?
A
A DNA sequence that transcription factors bind to
3
Q
What do repressors do?
A
Stop transcription
4
Q
What do activators do?
A
Start transcripton
5
Q
Whats a transcription factor?
A
A protein that binds to DNA and switches genes on or off by increasing or decreasing transcrption rate
6
Q
What do structual genes do?
A
Code for useful proteins e.g., enzymes
7
Q
What are the control elements?
A
Operator and promoter
8
Q
What do regulatory genes do?
A
Code for a transcription factor
9
Q
What does cAMP do?
A
Changes 3D structure of proteins
