Answer: Holoenzyme.
- A Apoenzyme
- B Holoenzyme
- C Coenzyme
- D Proenzyme
Correct answer: B. Holoenzyme
Explanation: Holoenzyme = apoenzyme (protein part) + cofactor (metal ion or coenzyme). The apoenzyme alone is catalytically inactive.
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.