The E Coli Lac Operon Encodes Three Genes

question 47

Multiple Choice

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 an enzyme that cleaves glucose, a transport protein for active transport, and a transacetylase enzyme for solubilizing lactose in the cytosol
• C) encode an enzyme that cleaves lactose, a transport protein for active transport of lactose, and a transacetylase enzyme whose function is unknown
• D) catalyze the synthesis of lactose from glucose and galactose, produce transacetylase, and actively export lactose from the cell
• E) directly interact with the Lac repressor and initiate their own transcription

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