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
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Provide evidence that coevolution between plants and animals is probably more important in angiosperms than
gymnosperms.
What will be an ideal response?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
The enzyme nitrogenase is rather unique, as it specifically functions:a
in the absence of oxygen. b. in the absence of nitrogen. c. in the absence of carbon dioxide. d. in the presence of oxygen. e. in the presence of carbon dioxide.
Translational controls regulate the:a
activity of a protein product. b. rate at which an mRNA molecule is translated. c. rate at which an mRNA molecule is synthesized. d. uptake of nucleic acids into the cell. e. attachment of phosphate groups to polypeptides.