Operator is bound by
A: activator
B: repressor
C: promoter
D: enhancer
E: silencer
A: activator
B: repressor
C: promoter
D: enhancer
E: silencer
举一反三
- In prokaryotic cells, the DNA sequence which can be recognized and bound with RNA polymerase is called ( ) A: enhancer B: promoter C: silencer D: operator E: attenuator
- When only glucose is available to E. coli in the culture medium: ( ) A: cAMP-CAP is bound to the promoter； B: cAMP-CAP is not bound to the promoter； C: The repressor is not bound to the operator； D: The lac operon is turn on
- Operator: ( ) A: An operator is a DNA region that is working with promoter for genes to express. B: An operator is a DNA region at 5’ of a gene for a repressor to bind to prevent gene expression. C: An operator is a repressor protein to help genes to express. D: An operator is a repressor protein to inhibit genes to express.
- The operator is A: Another name for the terminator of a gene B: A DNA site bound by repressor proteins C: A protein that coordinates gene expression D: A part in the leader region of mRNA
- Which of the followings are composite parts? A: Protein generator B: Inverter C: RBS D: promoter E: enhancer