Single Choice

In lac operon, structural gene 'Z' synthesizes

A$$\beta$$ - galactosidase
Correct Answer
BGalactosidase permease
CGalactosidase transacetylase
DNone of the above

Solution

The lac operon is an operon responsible for transport and metabolism of lactose in Escherichia coli and other bacteria and carries the genes that codes for enzymes involved in lactose metabolism only. The lac operon has three structural genes. The lac Z gene codes for $$\beta$$-galactosidase which converts lactose into glucose and galactose. The lac Y gene codes for $$\beta$$-galactoside permease which transports lactose into the cell. The lac A gene codes for $$\beta$$-galactoside transacetylase. Thus, the correct answer is option A.

SIMILAR QUESTIONS

Genetics

Which of the following is required as inducer(s) for the expression of Lac operon?

Genetics

All of the following are part of an operon except

Genetics

Gene regulation governing lactose operon of E.coli that involves the lac I gene product is

Genetics

In the lac operon model, lactose molecules function as

Genetics

In the medium where E. coli was growing, lactose was added, which induced the lac operon. Then, why does lac operon shut down sometime after addition of lactose in the medium?

Genetics

Choose the correct answer from the alternatives given : The sequence of structural genes in lac operon is

Genetics

Choose the correct answer from the alternatives given : In E. Coli, the lac operon gets switched on when

Genetics

Choose the correct answer from the alternatives given : In E. Coli, the lac operon gets switched on when

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