Operator is()
A: where the
repressor binds to regulate gene expression in an operon.
B: controlled
by promoter.
C: is induced
by lactose.
D: is repressed
by tryptophan.
A: where the
repressor binds to regulate gene expression in an operon.
B: controlled
by promoter.
C: is induced
by lactose.
D: is repressed
by tryptophan.
举一反三
- 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.
- Operon do not include( ): A: promoter B: regulatory sequence C: operator D: structural gene E: trans-acting factor
- 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
- 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
- Operator is bound by A: activator B: repressor C: promoter D: enhancer E: silencer