Desensitization of a cell to a ligand may involve each of the following except
A) destruction of the ligand.
B) decrease in receptor ability to activate intracellular signaling pathway.
C) receptor destruction.
D) receptor endocytosis.
E) decrease in receptor affinity for the ligand.
Answer: A
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In a population in Hardy-Weinberg equilibrium, 75 percent of the individuals have a dominant allele for a particular gene (p=0.75) and 25 percent have a recessive allele (q=0.25). The proportion of homozygous recessive individuals in the F1 generation will be
A) 2.5%. B) 6.25%. C) 18.75%. D) 0%.
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Which one of the following establishes and maintains the resting potential?
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