Match List-I with List-II. **List - I** (a) Sucrose (b) Lactose (c) Maltose **List - II** (i) $\beta$-D-Galactose and $\beta$-D-Glucose (ii) $\alpha$-D-Glucose and $\beta$-D-Fructose (iii) $\alpha$-D-Glucose and $\alpha$-D-Glucose Choose the correct answer from the options given below :

Sucrose is built from -D-glucose and -D-fructose joined through both anomeric carbons, which is why it is non-reducing. Lactose is built from -D-galactose and -D-glucose joined by a linkage. Maltose is built from two -D-glucose units joined by an linkage. So sucrose pairs with -D-glucose and -D-fru…

JEE Main · 2021 · 26 Feb 2021 · Shift 2 · Biomolecules

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Match List-I with List-II.

List - I
(a) Sucrose
(b) Lactose
(c) Maltose

List - II
(i)

β

-D-Galactose and

β

-D-Glucose
(ii)

α

-D-Glucose and

β

-D-Fructose
(iii)

α

-D-Glucose and

α

-D-Glucose

Choose the correct answer from the options given below :

Answer: A → II, B → I, C → III

Solution

Sucrose is built from

α

-D-glucose and

β

-D-fructose joined through both anomeric carbons, which is why it is non-reducing. Lactose is built from

β

-D-galactose and

β

-D-glucose joined by a

β (1 \to 4)

linkage. Maltose is built from two

α

-D-glucose units joined by an

α (1 \to 4)

linkage. So sucrose pairs with

α

-D-glucose and

β

-D-fructose, lactose with

β

-D-galactose and

β

-D-glucose, and maltose with two

α

-D-glucose units.

JEE Main · 2021 · 26 Feb 2021 · Shift 2 · Match the columns

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