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Question
In lac operon, lactose acts as:
Options
Inducer
Co-inducer
Repressor
Co-repressor
Solution
Inducer
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RELATED QUESTIONS
Give one significant contribution to the following scientists:
G. Gamow
Short Answer Question:
Explain the role of lactose in ‘Lac Operon’.
Short Answer Question:
Describe the structure of ‘Operon’.
Long Answer Question:
Describe the ‘Lac-operon’.
Give diagrammatic representation of Lac-operon in the presence of inducer.
Select the WRONG statement from the following with reference to lac operon.
Match the Column I (Enzymes) with Column II (Functions) and select the correct option.
|
Column I (Enzymes) |
Column II (Functions) |
||
| i. | Permease | P. | Transfers an acetyl group from acetyl CO-A to galactoside |
| ii. | β-galactosi dase | Q. | Entry of lactose into the cell |
| iii. | Transacetylase | R. | Digests lactose into galactose and glucose |
| S. | Aminoacylation |
In E.coli, the lac operon gets switched on when ______.
Select the two correct statements out of the four (A-D) given below about lac operon.
- Glucose or galactose may bind with the repressor and inactivate it.
- In the absence of lactose, the repressor binds with the operator region.
- The z-gene codes for permease.
- This was elucidated by Francois Jacob and Jacque Mono.
Explain the components of the structural genes in the Lac operon system in E.coli.
