객관식
When the active site of an enzyme is phosphorylated on one of its catalytic amino acid residues, the overall _______________ charge of phosphate groups would _____________ the affinity for a polar, negatively charged substrate.
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7. Enzyme Inhibition and Regulation
Phosphorylation
Multiple Choice
In the context of phosphorylation, what is the primary function of a protein kinase?
A
It hydrolyzes to generate as a second messenger.
B
It removes phosphate groups from phosphorylated proteins, reversing phosphorylation.
C
It catalyzes the transfer of a phosphate group from to a specific amino acid residue on a target protein.
D
It catalyzes the formation of peptide bonds during protein synthesis on the ribosome.
검증된 단계별 안내1
Understand that phosphorylation is a biochemical process where a phosphate group is added to a protein, often regulating the protein's function.
Recognize that protein kinases are enzymes specifically involved in this process by transferring phosphate groups.
Recall that the phosphate donor in phosphorylation reactions is typically ATP (adenosine triphosphate).
Identify that the primary function of a protein kinase is to catalyze the transfer of a phosphate group from ATP to a specific amino acid residue (such as serine, threonine, or tyrosine) on the target protein.
Note that this phosphorylation can alter the activity, interactions, or localization of the protein, which is crucial for many cellular signaling pathways.
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