_________________ is a type of genetic drift that results from a natural disaster (such as a hurricane or volcanic explosion) or human - caused event (overhunting) that randomly wipes out a large portion of a population.
A. Gene flow
B. Migration
C. The bottleneck effect
D. The founder effect
C. The bottleneck effect
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Tacrolimus (FK-506) is a drug that inhibits an enzyme called calcineurin. Calcineurin is a protein phosphatase. This is an enzyme that dephosphorylates (removes phosphate groups) from proteins. When added to cells, tacrolimus can inhibit the dephosphorylation of a protein called NFAT, but it cannot prevent the dephosphorylation of a protein called CDK1. What is the most likely explanation for this finding?
A. Calcineurin requires an additional cofactor to dephosphorylate NFAT B. NFAT is a substrate of calcineurin, but CDK1 is not C. Tacrolimus is a competitive inhibitor of calcineurin for NFAT and CDK11 D. Tacrolimus changes the optimum pH for calcineurin Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about phosphates and enzymestructure? What other information is related to the question? Choose Answer Do you have all necessary information to analyze how tacrolimus works on NFAT and CDK1? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The atomic number of the atom depicted in the figure is
a. 5. b. 7. c. 8. d. 15. e. 22.
Cells will export large molecules across the plasma membrane by
1.diffusion. 2.osmosis. 3.exocytosis. 4.endocytosis. 5.phagocytosis.
One concern frequently voiced by those opposed to globalization is that falling barriers to international trade destroy manufacturing jobs in wealthy advanced economies such as the United States and Western Europe
a. true b. false