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The end prodict of metabolic panthway m...

The end prodict of metabolic panthway may bind a repressor to make the latter active enough to bind to operator. In this case the end-product is called :-

A

Inducer

B

Aporepressor

C

Co-repressor

D

Regulator

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The correct Answer is:
C
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The lac operon consists of a regulation gene and three structural gene. The lactose acts as inducer. In the presence of an Inducer such as lactose, the repressor is in inactivated during the interaction. This allows RNA polymerase access to the promoter and transcription proceeds. The repressor is synthesized which in turn binds with the operator region of the operon and prevents RNA polymerase from transcribing the operon. The lac operon of E. coli contains genes involved in lactose metabolism. It's expressed only when lactose is _____ (1)and glucose is _____(2).

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MOTION-MOLECULAR BASIS OF INHERITANCE-EXERCISE - 1
  1. Gene which is responsible for the synthesis of a polypeptide chain is ...

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  2. Which is true for typtophan operon :-

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  3. The end prodict of metabolic panthway may bind a repressor to make th...

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  4. Which is true for repressible operon :-

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  5. What does ''lac'' refer to in what we call the lac operon ?

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  6. Which of the following is produced by E-Coli in the lactose operon.

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  7. A functional complex comprising a cluster of genes including structura...

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  8. Functioning of structural gene is controlled by:

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  9. Who explained the operon model the first time

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  10. The accessibility of promote regions of prokaryotic DNA by RNA polymer...

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  11. Regulation of lac operon by repressor is referred to as -

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  12. Which is incorrect

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  13. Which is the primary step for regulation of gene expression.

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  14. The sequence of structural genes in lac operon is

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  15. DNA finger printing was invented by :-

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  16. Which one of the following pairs of terms/names mean one and the same ...

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  17. What is the first step in the Southern Blot technique

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  18. Which step does not involve in DNA finger printing

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  19. The technique of transferring DNA fargment separated on agarose gel to...

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  20. Western blotting is used for the identification of :-

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