Which hormone triggers gallbladder contractions?
a. secretin
b. gastrin
c. insulin
d. cholecystokinin
e. enterogastrone
D
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How many chromosomes are in human gametes?
a. 22 b. 23 c. 24 d. 21
What results as the size of a population approaches the carrying capacity of its environment?
A) The growth rate increases. B) A graph of population growth resembles a "J." C) The population stabilizes at its maximum size. D) Birth rates become proportionally much greater than the death rates.
A typical enzyme found in the human body should have which optimum temperature?
a) 23 degrees C b) 37 degrees C c) 0 degrees C d) 100 degrees C
Which of the following statements about DNA structure is false?
A: It is antiparallel. B: It has a uniform diameter. C: It is a double-stranded helix. D: The 3´end is phosphorylated. E: It is a right-handed helix.