Proteins contain both acidic and basic R groups and can, therefore, function as
A) energy storage macromolecules.
B) structural macromolecules.
C) buffers.
D) catalysts.
E) genetic material.
C
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In a receptor tyrosine kinase, formation of the dimer is initiated by
1.two receptor molecules each binding a signal molecule. 2.binding of phosphates to tyrosines on the cytoplasmic segment of the receptors. 3.activation of the protein kinase sites on the receptor. 4.receptor autophosphorylation. 5.activation of cellular proteins.
Phosphodiesterase catalyzes the conversion of:
a. IP3 to PIP2. b. GDP to GTP. c. cAMP to AMP. d. calcium to calcium-calmodulin. e. a protein to a phosphorylated protein.
In a neuron at rest, there is a(n) higher concentration of sodium ions outside the cell than inside
____________________ Indicate whether the statement is true or false.
The hormones FSH and LH are produced by the ________
Fill in the blank(s) with correct word