Final answer:
Sucrose, maltose, and lactose are all disaccharides made up of different combinations of monosaccharide units: glucose, fructose, and galactose.
Step-by-step explanation:
Sucrose, maltose, and lactose are all disaccharides, which are carbohydrates made up of two monosaccharide units.
Sucrose is composed of glucose and fructose. It is commonly found in table sugar.
Maltose is made up of two glucose molecules. It is often found in grains and malt products.
Lactose is composed of glucose and galactose. It is the sugar present in milk.