How does phosphate enter the soil?
A. photosynthesis
B. cellular respiration
C. conversion in the atmosphere due to lightning
D. precipitation from clouds
E. weathering of rocks
Answer: E
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A candy bar contains 108 calories per serving. There are 4 grams of carbohydrate, 5 grams of protein, and 8 grams of fat in a serving. How many of the calories come from fat?
A. 72 B. 16 C. 18 D. 20
Which of the following was an emerging mosquito-borne disease in the early 2000s but has now decreased in frequency?
A) malaria B) Rocky Mountain spotted fever C) typhus D) West Nile fever
Which of the following is the ultimate source of chemical energy for all living organisms?
a. glucose b. photosynthesis c. GTP d. cellular respiration
How does lambda phage solve the problem of replicating the ends of its linear genome?
a. Its genome is circularized for replication. b. A protein binds to the terminus to facilitate replication. c. There are complementary repeats at each end that serve as templates for each other. d. Additional repeat units are added at the terminus to allow replication. e. A crosslink structure is formed at the terminus to avoid its having a free end.