(A) Describe by Labeled Diagram the Structural Components of the Lac

question 45

Essay

(a) Describe by labeled diagram the structural components of the lac operon in E. coli.
a() State the function of the lac regulator gene.
b() State the function of fi -galactosidase in the lac system.
c() Show by diagram the manner in which lactose brings about transcription of the three structural genes of the lac operon.
d() Explain why certain mutations in the regulator gene (I -) of the lac system result in maximal synthesis of fi -galactosidase, permease, and transacetylase even in the
absence of the inducer (lactose).

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Definitions:

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Individuals or entities engaged in the buying and selling of goods or services for profit.

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The unauthorized act of possessing or using someone else's property as if it were one's own, which interferes with the owner's rights.

Dominion

Supreme authority or control over a domain, or the ownership and absolute right to use, enjoy, and dispose of property.