A small number of cell surface receptors can ultimately generate a large intracellular response due to activation of kinase cascades. This is referred to as
A. signal activation.
B. signal transduction.
C. signal dampening.
D. signal amplification.
Answer: D
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Monozygotic twin concordance values are less than 100% in both bipolar disorder and schizophrenia. This suggests that these disorders ____
a. are strictly polygenic b. have environmental components c. are X-linked d. genetically dominant e. are not genetically based
Acute bacterial endocarditis differs from subacute bacterial endocarditis in the
A. suddenness and severity of onset. B. population affected. C. resultant damage. D. development of exotoxin shock.
The removal of the root cap eliminates the ability of a root to respond to gravity.
Answer the following statement true (T) or false (F)
Genetic engineering has been able to provide xenotransplants that do not elicit the hyperacute reaction. Indicate whether the statement is true or false