What is operon?Explain types of Genes what make up an operon.

What is an operon ? Explain the functioning of lac operon when in an open state.

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.

Explain the role of Lactose as inducer in Lac-operon.

Operon is

Operon is

What is an ‘Inducible Operon’? Explain the regulation of gene expression in prokaryotes with the help of ‘Lac-Operon'.

(a) What is an operon ? (b) Explain how a polycistronic structural gene is regulated by a common promoter and a combination of regulatory genes in a lac- opron.

Enlist the genes in Lac operon

Explain the concept of operon.

What does ''lac'' refer to in what we call the lac operon ?