Answer: Kinases.
- A Hydrolases
- B Kinases
- C Isomerases
- D Ligases
Correct answer: B. Kinases
Explanation: Kinases are a class of transferases that transfer phosphate groups from ATP to a substrate. Example: hexokinase phosphorylates glucose in glycolysis.
As substrate concentration rises, reaction rate increases steeply at first, then plateaus at Vmax once every enzyme molecule is working at full capacity; Km is the substrate concentration giving half-maximal rate, and a LOWER Km means the enzyme reaches that rate with less substrate (higher affinity).
Concept context
Carbohydrates, proteins, lipids, nucleic acids, and enzyme kinetics. Essential foundation for understanding metabolism.