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.
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.
举一反三
- 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
- Operator is() A: where the<br/>repressor binds to regulate gene expression in an operon. B: controlled<br/>by promoter. C: is induced<br/>by lactose. D: is repressed<br/>by tryptophan.
- TrpR Repressor与Lac Repressor一样都是与诱导物(inducer)结合后不能结合到操纵基因(operator)上。_
- 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