According to the Hardy-Weinberg principle, which of the following must be true for gene frequencies in a population to remain the same?
A) Mating is random.
B) Mutations occur consistently.
C) The population is small.
D) Natural selection occurs.
A
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If an individual has his/her gallbladder removed, he/she is typically put on a low-fat diet. Which of the following would explain this recommendation?
A. Bile acids cannot be produced. B. Bile acids cannot be removed from the intestines. C. Bile acids cannot be released following a meal. D. Lipase cannot be released following a meal. E. Lipase cannot be produced.
Bone remodeling not only replaces old bone, but it also
a. maintains homeostasis of the blood level of calcium. b. leads to osteoporosis. c. decreases blood calcium levels. d. causes activation of phagocytic white blood cells. e. causes complete reshaping of bones.
Alon claimed that a tincutre of a local herb was effective in lowering anxiety and was planning to invest in the product. As evidence of his claim, Alon, who had anxiety over his financial situation, said that he felt much better after the treatemt, was much more relaxed, and no longer worried about his finances. Which of the following combinations of methodological flaws BEST characterizes Alon's investigation?
a) lack of an appropriate outcome measure b) lack of appropriate controls and lack of an appropriate outcome measure c) lack of randomization, lack of replication, and lack of an appropriate outcome measure d) lack of replication and lack of appropriate controls e) lack of an appropriate outcome measure, replication, randomization, and controls
The study of enzymes also includes an examination of how the activity is regulated. Molecules that can act as competitive inhibitors for a specific reaction are often similar in shape and size to the enzyme's substrate
Which variable(s) used to describe enzyme activity will remain the same in the presence and absence of a competitive inhibitor? (a) Vmax (b) V (c) Vmax and Km (d) Km