- A Glucose and fructose
- B Glucose and galactose
- C Galactose and fructose
- D Two glucose units
Correct answer: B. Glucose and galactose
Explanation: Lactose (milk sugar) is a disaccharide of glucose + galactose linked by a beta-1,4-glycosidic bond. Lactase enzyme breaks it down.
Concept context
Carbohydrates, proteins, lipids, nucleic acids, and enzyme kinetics. Essential foundation for understanding metabolism.