JEE Main · 2020 · 08 Jan 2020 · Shift 2 · Biomolecules

Two monomers in maltose are:

(A) $α$ -D-glucose and $α$ -D-galactose
(B)α-D-glucose and β-D-glucose
(C)α-D-glucose and α-D-glucose✓ Correct
(D)α-D-glucose and α-D-Fructose

Answer: (C)

Solution

Maltose is built from two

α

-D-glucose units joined by an

α (1 \to 4)

glycosidic linkage between

C_{1}

of one glucose and

C_{4}

of the next. Its hydrolysis returns two molecules of

α

-D-glucose, so both monomers are

α

-D-glucose.

JEE Main · 2020 · 08 Jan 2020 · Shift 2 · Single correct option

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