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The lac operon consists of...

The lac operon consists of

A

Four regulatory genes only

B

One regulatory gene and three structural genes

C

Two regulatroy genes and two structural genes

D

There regulatory genes and three structural genes.

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The correct Answer is:
D
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An operon consists of

Which of following statement is true for lac operon in E-coli (a) lac operon consists of one regulatory gene and five structural gene. (b) The i gene codes for inducer (c) The z-gene codes for beta -galacosidase (d) A very low level of expression of lac operon has to be present in cell all the time

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