Which of the following pairs are both disaccharides?

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Multiple Choice

Which of the following pairs are both disaccharides?

Explanation:
Disaccharides are sugars made from two monosaccharide units joined together by a glycosidic bond. Sucrose is formed from glucose and fructose, while lactose is formed from galactose and glucose, so both of these are disaccharides. The other pairs each consist of single monosaccharide units (glucose, fructose, galactose are all individual sugars) or ribose/deoxyribose, which are also monosaccharides. Therefore, the pair where both components are disaccharides is the one containing sucrose and lactose.

Disaccharides are sugars made from two monosaccharide units joined together by a glycosidic bond. Sucrose is formed from glucose and fructose, while lactose is formed from galactose and glucose, so both of these are disaccharides. The other pairs each consist of single monosaccharide units (glucose, fructose, galactose are all individual sugars) or ribose/deoxyribose, which are also monosaccharides. Therefore, the pair where both components are disaccharides is the one containing sucrose and lactose.

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