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The accessibility of promote regions of ...

The accessibility of promote regions of prokaryotic DNA by RNA polymerase is in many cases regulated by the interaction of some protein with sequences termed as -

A

Promoter

B

Operator

C

Regulator

D

Cistron

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The correct Answer is:
B
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Assertion :- The activity of RNA polymerase at a pormotor is regulated by interaction with accessory protein, which affect its ability to recognise start sites. Reason : The accessibility of promotor ragion of prokaryotic DNA is in many cases is regulated by interactin of proteins with operators.

In a transcription unit, the activity of RNA polymerase at a given promoter is in turn regulated by interaction with accessory proteins, which affect its ability to

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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. Identify the correct sequence of the structural genes in the lac operon.

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Assertion : The predominant site for control ofgene expression in prokaryotes is transcription initiation. Reason : The activity of RNA polymerase is regulated by accessory proteins, which affect recognition of start sites.

MOTION-MOLECULAR BASIS OF INHERITANCE-EXERCISE - 1
  1. Functioning of structural gene is controlled by:

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  2. Who explained the operon model the first time

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

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

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  5. Which is incorrect

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

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  7. The sequence of structural genes in lac operon is

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  8. DNA finger printing was invented by :-

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

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

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  11. Which step does not involve in DNA finger printing

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

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

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  14. Which of the following techniques are used in analyzing restrication f...

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  15. The approximate number of genes contained in the genome of Kalpana Cha...

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  16. The total number of nitrogenous bases in human genome is estimated to ...

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  17. The transfer of protein from electophoretic gel to nitrocellulose memb...

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  18. The method of DNA fingerprinting involves the use of :

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  19. Which of the following is not associated with HGP-

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  20. In density gradient centrifugation, the bulk DNA forms while satelite ...

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