287088
Sucrose in water is dextro-rotatory, \([\alpha]_{D}=+\) \(66.4^{\circ}\). When boiled with dilute HCl , the solution becomes leavo-rotatory, \([\alpha]_{D}=-20^{\circ}\). In this process, the sucrose molecule breaks into
1 L-glucose + D-fructose
2 L-glucose + L-fructose
3 D-glucose + D-fructose
4 D-glucose + L-fructose
Explanation:
(c) The hydrolysis of sucrose by boiling with mineral acid or by enzyme invertase or sucrase produces a mixture of equal molecules of \(D(+)\) glucose and \(D(-)\) Fructose.
NCERT| Page-417 / N-287| 1996
BIOMOLECULES (NEET PYQS)
287089
The \(\alpha-\mathrm{D}\) glucose and \(\beta\)-D glucose differ from each other due to difference in carbon atom with respect to its
1 Conformation
2 Configuration
3 Number of OH groups
4 Size of hemiacetal ring
Explanation:
(b) \(\alpha-D\) glucose and \(\beta\)-D glucose are the isomers which differ in the orientation (configuration) of H and OH groups around \(\mathrm{C}_{1}\) atom.
287088
Sucrose in water is dextro-rotatory, \([\alpha]_{D}=+\) \(66.4^{\circ}\). When boiled with dilute HCl , the solution becomes leavo-rotatory, \([\alpha]_{D}=-20^{\circ}\). In this process, the sucrose molecule breaks into
1 L-glucose + D-fructose
2 L-glucose + L-fructose
3 D-glucose + D-fructose
4 D-glucose + L-fructose
Explanation:
(c) The hydrolysis of sucrose by boiling with mineral acid or by enzyme invertase or sucrase produces a mixture of equal molecules of \(D(+)\) glucose and \(D(-)\) Fructose.
NCERT| Page-417 / N-287| 1996
BIOMOLECULES (NEET PYQS)
287089
The \(\alpha-\mathrm{D}\) glucose and \(\beta\)-D glucose differ from each other due to difference in carbon atom with respect to its
1 Conformation
2 Configuration
3 Number of OH groups
4 Size of hemiacetal ring
Explanation:
(b) \(\alpha-D\) glucose and \(\beta\)-D glucose are the isomers which differ in the orientation (configuration) of H and OH groups around \(\mathrm{C}_{1}\) atom.
