Multiple Choice
The reaction below is catalyzed by the enzyme arginase. What is the classification of this enzyme?
a) Hydrolyase.
b) Oxidoreductase.
c) Lyase.
d) Ligase.
6. Enzymes and Enzyme Kinetics
Types of Enzymes
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Kinases add phosphate groups to molecules. Kinases are an example of which class of enzyme?
A
Oxidoreductase.
B
Phosphorylase.
C
Hydrolyase.
D
Transferase.
Verified step by step guidance1
Understand the role of kinases: Kinases are enzymes that catalyze the transfer of phosphate groups from high-energy donor molecules, like ATP, to specific substrates. This process is known as phosphorylation.
Identify the function of each enzyme class: Oxidoreductases are involved in oxidation-reduction reactions, Phosphorylases add phosphate groups by breaking a bond using inorganic phosphate, and Hydrolases catalyze the hydrolysis of various bonds.
Recognize the definition of Transferases: Transferases are enzymes that catalyze the transfer of a functional group (e.g., a phosphate group) from one molecule to another.
Relate the function of kinases to the enzyme class: Since kinases transfer phosphate groups from ATP to other molecules, they fit the definition of Transferases.
Conclude that kinases belong to the Transferase class of enzymes, as they facilitate the transfer of phosphate groups, aligning with the characteristics of this enzyme class.
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