The E Coli lac operon encodes three genes. These genes: A) cleave lactose into g

Question

The E Coli lac operon encodes three genes. These genes: A) cleave lactose into glucose and galactose, produce transacetylase, and actively transport lactose into the cell. B) encode for an enzyme that cleaves glucose , a tranport protein for active transport, and a transacetylase enzyme for solubilizing lactose in the cytosol. C) encode for an enzyme that cleaves lactose , a transport protein for active transport of lactose, and a transacetylase enzyme whose function is still unknown. D) catalyze the synthesis of lactose from glucose and galactose , produce transacetylase, and actively export lactose from cell E) directly interact with the lac repressor and intiate their own transcription

Explanation / Answer

The answer is C. But now the transacetylase enzyme function also found.

Find the below genes and its functions...

lacZ encodes -galactosidase - cleaves the lactose into glucose and galactose.
lacY encodes Beta-galactoside permease - a transmembrane symporter, it pumps -galactosides (eg: lactose) into the cell using a proton gradient in the same direction.
lacA encodes -galactoside transacetylase - enzyme that transfers an acetyl group from acetyl-CoA to -galactosides.

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