Biomolecules Ques 78

78. Lactose is composed of

(a) Glucose + Glucose

(b) Glucose + Fructose

(c) Fructose + Galactose

(d) Glucose + Galactose

Show Answer

Answer : d

Hints & Solutions

(d) Lactose is a disaccharide that consists of $\beta$-D-galactose and $\beta$ - $D$-glucose molecules bonded through a $\beta 1-4$ glycosidic linkage. Lactose makes up around $2-8 \%$ of the solids in milk. The name comes from the Latin word for milk, plus the -ose ending used to name sugars.



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