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Molecular Basis Of Inheritance

Question

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What is the inducer in the lac operon? How does it ensure the “switching on” of genes?
Draw a schematic representation of Lac operon of how does this operon get switched ‘on’ or ‘off.
Or
Explain how the gene expression is regulated?

Solution

Inducer in lac operon is lactose which binds to the repressor and prevents it from binding to the operator and blocking transcription.

Fig. Lac operon

Some More Questions From Molecular Basis of Inheritance Chapter

Which was first genetic material ?

Suggest one evidence to prove that RNA was first genetic material.

Why was RNA unstable ?

What made DNA more preferrable as genetic material ?

Process of replication is completed in how much time in E.coli ?

What is average rate of polymerization ?

List three components of transcription unit.

Which RNA acts as an adapter ?

Name three kinds of polymerases.

What is splicing ?

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