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In Operon concept, regulator gene functi...

In Operon concept, regulator gene functions as

A

Repressor

B

Regulator

C

Inhibitor

D

All of these

Text Solution

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The correct Answer is:
a
a) Regualar gene produces a repressor that binds to operator gene and stops the working of the latter.
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In lac operon,the regulator gene codes for

Study the schematic representation of the genes involved in the lac operon given below and answer the questions that follow : {:(p,i,p,o,z,y,a):} (a) Identify and name the regulatory gene in this operon. Explain its role in 'switching off' the operon. (b) Why is the lac operon's regulation referred to as negative regulation ? (c ) Name the inducer molecule and the products of the genes 'z' and 'y' of the operon. Write the functions of these gene products.

Assertion (A): Lactose is the substrate for the enzyme beta-galactosidase and it regulates switching on and off of the lac operon. Reason ( R): The lac operon consists of one regulatory gene and three structural genes.

ERRORLESS -MOLECULAR BASIS OF INHERITANCE-Molecular Basis Of Inheritance
  1. Pleitropy is a condition in which a single gene

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  2. In lac operon , the genes a, I, y and z code respectively for

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  3. In Operon concept, regulator gene functions as

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  4. Genes that are involved in turning on or off the transcription of set ...

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  5. The codon AUG has dual function. It is an initiation codon and also c...

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  6. Whobble hypothesis was given by

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  7. Out of 64 codons , 61 codons code for 20 types of amino acid. It is ca...

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  8. The regulatory genes are located

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  9. Which one of the following codes for the same information as UGC

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  10. Identify the correct match between the codons and coding functions{:(...

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  11. Which one the following pairs is correctly matched

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  12. naturally occurring coding strand composed of alternating C and U resi...

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  13. Which one of the following pairs is correctiy matched with regard to t...

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  14. A sequence of how many nucleotides in messenger RNA makes a for an ami...

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  15. In E. coli an operator gene combine with

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  16. Operon is

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  17. Code of m- RNA and proteins are

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  18. Which of the following cartoon characters does not share its name with...

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  19. Which of the following is the simplest amino acid

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  20. Gene regulation governing lactose operon of E. coli that involves the ...

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