When dividing up into teams, its best to keep each group:
A. small
B. uneven
C. large
D. moving
Answer: A
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Each of the following cytokines is paired correctly with one of its functions except
A) IL-5 and IL-6/stimulate B cells into becoming plasma cells and memory cells. B) IL-2/stimulate and amplify T helper lymphocyte response. C) CD 40 and IL-4/antibody class switching. D) IL-7/stimulate development of pro-B and pre-B lymphocytes. E) IL-1/expression of IgM and IgD on B cell surface.
Why is intact mRNA so hard to purify?
A) RNases are relatively resistant to destruction. B) It is inherently a molecule with a short life. C) RNases are present in almost every environment, including on human skin. D) All of the above.
Which of following statements about the process of respiration is FALSE?
A) When the diaphragm contracts, it moves downward. B) The intercostal muscles assist inhalation by raising the rib cage. C) Air flows into the lungs with exhalation. D) A quiet, unforced exhalation is a passive process because it does not require any muscle contraction.
CHD risk is reduced by all of the following EXCEPT
a. smoking cessation. b. blood pressure under 120/80. c. LDL below 100 mg/dL. d. HDL below 40 mg/dL.