According to the lock-and-key model, in order for a drug to bind it must have the proper
A) configuration.
B) conformation.
C) functional groups.
D) all of the above
D
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Garbage produced directly by households and businesses accounts for ____ of the solid waste produced in the United States
a. less than 2% b. 5% c. 10% d. 15% e. 20%
Arctic air masses
A) have about the same temperature characteristics as cP air masses. B) are typically several kilometers thick. C) frequently blanket much of the eastern United States in winter. D) produce little precipitation. E) do not affect North America.
The primary reason agricultural productivity increased during the Green Revolution was a combination of fertilizers, crop breeding, pest control, and ________
A) increased rainfall B) less overgrazing C) genetically modified organisms D) organic farming techniques E) irrigation improvements
Which energy source used to run an automobile produces the least amount of harmful emissions?
A. hydrogen B. methane C. natural gas D. gasoline