Multiple Choice
The reaction below is catalyzed by the enzyme arginase. What is the classification of this enzyme?
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6. Enzymes and Enzyme Kinetics
Types of Enzymes
Multiple Choice
In biochemistry, a kinase is an enzyme that performs which type of reaction?
A
Hydrolysis of peptide bonds in proteins
B
Transfer of a phosphate group (phosphorylation), typically from ATP to a substrate
C
Isomerization by rearranging atoms within a single molecule without adding or removing groups
D
Oxidation-reduction (electron transfer) reactions using NADH or FADH2
Verified step by step guidance1
Understand that kinases are enzymes involved in modifying other molecules by adding a specific chemical group.
Recall that phosphorylation is the process of transferring a phosphate group to a substrate molecule, which is a common regulatory mechanism in cells.
Recognize that kinases typically transfer a phosphate group from a high-energy donor molecule, such as ATP, to a target substrate.
Differentiate kinase activity from other enzyme functions such as hydrolysis (breaking bonds), isomerization (rearranging atoms), and oxidation-reduction (electron transfer).
Conclude that the defining reaction catalyzed by kinases is the transfer of a phosphate group, known as phosphorylation.
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