JEE Advanced · 2015 · 24 May 2015 · Paper 1 · Biomolecules

A known artificial sweetener X is composed of 4-chloro-4-deoxy-α-D-galactose and 1,6-dichloro-1,6-dideoxy-β-D-fructose joined by a glycosidic linkage. Structure of D-galactose is given below:

The correct structure of $\mathbf{X}$ is:

The correct statement(s) regarding sugars is (are)

Given: Specific rotations of L-(-)-glucose and L-(+)-fructose are -52.5° and +92.5°, respectively.

Match the compounds in List-I with the appropriate observations in List-II and choose the correct option.

List-I
(P) (see structure)
(Q) (see structure)
(R) (see structure)
(S) (see structure)

List-II
(1) Reaction with phenyl diazonium salt gives yellow dye.
(2) Reaction with n …

A linear octasaccharide (molar mass $=1024\mathrm{g}{\mathrm{mol}}^{-1}$) on complete hydrolysis produces three monosaccharides: ribose, 2-deoxyribose and glucose. The amount of 2-deoxyribose formed is $58.26\%(\mathrm{w}/\mathrm{w})$ of the total amount of the monosaccharid …

Aspartame, an artificial sweetener, is a dipeptide aspartyl phenylalanine methyl ester. The structure of aspartame is

For a double strand DNA, one strand is given below:

The amount of energy required to split the double strand DNA into two single strands is ____ $\mathrm{kcal}{\mathrm{mol}}^{-1}$.
[Given : Average energy per H-bond for A-T base pair $=1.0\mathrm{kcal}{\mathrm{mol}}^{-1}$, G- …