Transition-state analogs do which of the following?
A) They assist in the synthesis of specialized enzymes.
B) They assist in transporting the substrate to the active site.
C) They enhance enzyme activity.
D) They inhibit enzyme activity.
D
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Which is more dangerous: touching a faulty 120-V lamp socket or a Van de Graaff generator charged to 100,000 V?
A. Generator. B. Lamp socket. C. both equally D. can't be estimated
Sometimes formations on land can shed light on ocean processes. What do the White Cliffs of Dover in England show?
A) An accumulation of diatomaceous earth that has risen above sea level from plate tectonics. B) An accumulation of siliceous ooze that has risen above sea level from plate tectonics. C) Sediment that has undergone lithification and pushed above sea level from plate tectonics. D) All of these choices are true of the White Cliffs of Dover.
All oceans, ice, and freshwater sources are included in Earth's _____
a. lithosphere b. hydrosphere c. biosphere d. atmosphere e. exosphere
Savanna is a mix of ________ species
A) forest B) woodland C) grassland D) desert E) subarctic