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Sequence of structural genes of lac oper...

Sequence of structural genes of lac operon is

A

y, z, a

B

z, y, a

C

a, y, z

D

a, z, y

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The correct Answer is:
B
Sequence of structural gene of lac operon is z, y and a.
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The sequence of structural genes in lac operon is

A polycistronic structural gene of lac operon is regulated by

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.

Number of structural genes in tryptophan operon is

(a) Explain the role of regulatory gene, operator and structural genes in lac operon when E. Coli is growing in a culture medium with the sources of energy as lactose.

Repressor of lac-operon

The sequence of genes in lac operon in E. coli is :

The promoter gene in lac operon :

Enlist the genes in Lac operon

How are the structural genes inactivated in lac operon in E. Coli? Explain.

A2Z-MOLECULAR BASIS OF INHERITANCE-Section A: Topicwise Questions (topic 7: Regulation Of Gene Expression) The Lac Operon
  1. Recognise the figure and find out the correct matching.

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  2. The lac operon is turned on when allolactose molecules bind to

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  3. An environmental agent that triggers transcription from an operon is a...

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  4. The genes are responsible for growth and differentiation in an organis...

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  5. In operon model, regulator gene functions as

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  6. Operon contains

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  7. In Escherichia coli, the product of i gene combines with

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  8. Operon is

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  9. Escherichia coli with mutated z gene of lac operon cannot grow in medi...

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  10. Match the column and choose the correct option.

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  11. Lac operon concept was proposed by

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  12. Escherichia coli growing on medium having glucose is transferred to la...

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  13. In Lac-operon, repressor protein binds to

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  14. A gene of operon which forms the repressor protein is

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  15. Operon model of gene regulation and organisation of prokaryotes was pr...

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  16. Sequence of structural genes of lac operon is

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  17. What is correct gene expression pathway ?

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  18. Lac operon 'inducer lactose' serves as an anzyme substrate for anzyme

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  19. In lac operon model, lactose functions as

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  20. In lac operon genes a, i, y and z code for

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