Explain in detail lac operon?

Question

Explain in detail lac operon?

Answer 1

This isn't a botany question - It should be in biology.

Regardless...

The lac operon is a section of DNA in E. Coli which controls the bacteria's ability to consume lactose.

The way an operon works is that in the presence of lactose, a part of the inhibitor on the Lac Operon becomes inactive - Allowing the operon to be transcribed. Once the operon is transcribed, the corresponding messenger RNA strand makes it's way to a ribosome. Once there, it tells the ribosome to make a protein that the cell uses to digest lactose.

Answer 2

The lac operon is an operon required for the transport and metabolism of lactose in Escherichia coli and some other enteric bacteria. It consists of three adjacent structural genes, a promoter, a terminator, and an operator. The lac operon is regulated by several factors including the availability of glucose and of lactose. Gene regulation of the lac operon was the first genetic regulatory mechanism to be elucidated and is often used as the canonical example of prokaryotic gene regulation.

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Contents

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    * 1 Structure of the operon

          o 1.1 Genetic nomenclature

    * 2 Lactose analogues

    * 3 Classification of regulatory mutants

    * 4 Regulation by cyclic AMP

    * 5 Multimeric nature of repressor and the complex operator

          o 5.1 Mechanism of induction

    * 6 Use in molecular biology

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