Ca2+-calmodulin stimulates phosphorylation of myosin by
A) Ca2+-ATPase.
B) focal adhesion kinase.
C) myosin light chain kinase.
D) ryanodine receptor.
E) titin.
Answer: C
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In the reactions of glycolysis, acetyl-CoA formation and the citric acid cycle, chemical energy is transferred to the bonds in:
A. ATP. B. electron carriers. C. fats. D. a and b are correct. E. a, b, and c are all correct.
Luminescence
A. is catalyzed by luciferase. B. may be controlled by quorum sensing. C. may be produced by bacteria. D. All of the choices are correct.
Approximately what percent of the water that enters a plant is lost by transpiration?
a. 5 b. 10 c. 25 d. 50 e. 95
Superantigens are
A. bacterial toxins that activate T cells at a 100 times greater rate than other antigens. B. cell markers found in some member of a species but not in other members. C. body tissues that the immune system mistakes as foreign. D. antigens that evoke allergic reactions.