The lacA gene found within the lac operon encodes for galactosidase transacetylase. This enzyme attaches a(n) ________ group to lactose and lactose analogs.

A. amino
B. hydroxyl
C. carbonyl
D. acetyl
E. carboxyl


D. acetyl

Biology & Microbiology

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This aquatic ecosystem may include protists

and bacteria as producers in a well-lit zone and detritus feeders in a deeper dark zone.

a. estuary b. stream c. lake d. coral reef e. hydrothermal vent

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Translational controls regulate the:a

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