How does phosphorylation by kinases control protein activity? The transfer of a
ID: 315950 • Letter: H
Question
How does phosphorylation by kinases control protein activity?
The transfer of a phosphate group provides chemical energy to drive unfavorable reactions.
The addition of a phosphate group adds energy to a protein.
The addition of a phosphate group can induce major conformational changes in a protein.
The phosphate group, with its two negative charges, prevents other negatively charged molecules from interacting with the protein.
a)The transfer of a phosphate group provides chemical energy to drive unfavorable reactions.
b)The addition of a phosphate group adds energy to a protein.
c)The addition of a phosphate group can induce major conformational changes in a protein.
d)The phosphate group, with its two negative charges, prevents other negatively charged molecules from interacting with the protein.
Explanation / Answer
The correct answer is:c)The addition of a phosphate group can induce major conformational changes in a protein.
Reason:Kinases phosphorylate the proteins on target aminoacid residues which bring about conformational changes in the proteins that then carry forward the signalling process.
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