Answer: Position of -OH group at C1.
- A Number of carbon atoms
- B Position of -OH group at C1
- C Number of oxygen atoms
- D Type of glycosidic bond only
Correct answer: B. Position of -OH group at C1
Explanation: Alpha-glucose has the -OH group at C1 pointing downward; beta-glucose has it pointing upward. This affects their polymerization: alpha forms starch, beta forms cellulose.
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.