Answer :
Final answer:
The similar element in lactulose and lactose is the presence of galactose. The difference lies in the second component: fructose is in lactulose, glucose in lactose.
Explanation:
Lactulose and lactose, both being disaccharides, share a common feature - they are composed of two simple sugar units or monosaccharides. The similarity lies in one of the two units: both lactulose and lactose contain a molecule of galactose.
The difference between the two disaccharides is the second monosaccharide: in lactulose this is fructose, while in lactose it is glucose. This structural variation leads to different physical and biochemical properties between lactulose and lactose.
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