324562
Statement A : \(\mathrm{\beta}\)-glycosidic linkage is present in maltose. Statement B : Maltose is composed of two glucose units in which C-1 of one glucose unit is linked to C-4 of another glucose unit.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Maltose is compound of two \(\mathrm{\alpha-D}\) glucose units in which \(\mathrm{\mathrm{C} 1}\) of one glucose is linked to \(\mathrm{\mathrm{C} 4}\) of another glucose unit.
CHXII14:BIOMOLECULES
324563
Assertion : Acid or enzymatic hydrolysis of sucrose to give an equimolar mixture of glucose and fructose is called inversion. Reason : Sucrose is the only naturally occurring disaccharide which is reducing sugar.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Sucrose is dextrorotatory but after hydrolysis gives dextrorotatory glucose and laevorotatory fructose. Since the laevorotation of fructose \(\left(92.4^{\circ}\right)\) is more than dextrorotation of glucose \(\left(+52.5^{\circ}\right)\), the mixture is laevorotatory. Thus, hydrolysis of sucrose brings about a change in the sign of rotation, from dextro (+) to laevo \((-)\) and the product is named as invert sugar. Since the reducing groups of glucose and fructose are involved in glycosidic bond formation, sucrose is a non reducing sugar. So, option (3) is correct.
CHXII14:BIOMOLECULES
324564
Assertion : Two sugar units are joined by 1,2- glycosidic bond in sucrose Reason : It contains \(\mathrm{C}_{1}-\) glucose and \(\mathrm{C}_{2}-\) fructose glycosidic bond.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are correct.
Explanation:
Sucrose on hydrolysis gives equimolar mixture of D - \((+)\) - glucose and D - (-)-fructose. These two monosaccharides are held together by a glycosidic linkage between \(\mathrm{C}-1\) of \(\alpha-\) glucose and \(\mathrm{C}-2\) of \(\beta\) - fructose. Therefore, both Assertion and Reason are true and Reason is the correct explanation of the given Assertion.
324562
Statement A : \(\mathrm{\beta}\)-glycosidic linkage is present in maltose. Statement B : Maltose is composed of two glucose units in which C-1 of one glucose unit is linked to C-4 of another glucose unit.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Maltose is compound of two \(\mathrm{\alpha-D}\) glucose units in which \(\mathrm{\mathrm{C} 1}\) of one glucose is linked to \(\mathrm{\mathrm{C} 4}\) of another glucose unit.
CHXII14:BIOMOLECULES
324563
Assertion : Acid or enzymatic hydrolysis of sucrose to give an equimolar mixture of glucose and fructose is called inversion. Reason : Sucrose is the only naturally occurring disaccharide which is reducing sugar.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Sucrose is dextrorotatory but after hydrolysis gives dextrorotatory glucose and laevorotatory fructose. Since the laevorotation of fructose \(\left(92.4^{\circ}\right)\) is more than dextrorotation of glucose \(\left(+52.5^{\circ}\right)\), the mixture is laevorotatory. Thus, hydrolysis of sucrose brings about a change in the sign of rotation, from dextro (+) to laevo \((-)\) and the product is named as invert sugar. Since the reducing groups of glucose and fructose are involved in glycosidic bond formation, sucrose is a non reducing sugar. So, option (3) is correct.
CHXII14:BIOMOLECULES
324564
Assertion : Two sugar units are joined by 1,2- glycosidic bond in sucrose Reason : It contains \(\mathrm{C}_{1}-\) glucose and \(\mathrm{C}_{2}-\) fructose glycosidic bond.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are correct.
Explanation:
Sucrose on hydrolysis gives equimolar mixture of D - \((+)\) - glucose and D - (-)-fructose. These two monosaccharides are held together by a glycosidic linkage between \(\mathrm{C}-1\) of \(\alpha-\) glucose and \(\mathrm{C}-2\) of \(\beta\) - fructose. Therefore, both Assertion and Reason are true and Reason is the correct explanation of the given Assertion.
324562
Statement A : \(\mathrm{\beta}\)-glycosidic linkage is present in maltose. Statement B : Maltose is composed of two glucose units in which C-1 of one glucose unit is linked to C-4 of another glucose unit.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Maltose is compound of two \(\mathrm{\alpha-D}\) glucose units in which \(\mathrm{\mathrm{C} 1}\) of one glucose is linked to \(\mathrm{\mathrm{C} 4}\) of another glucose unit.
CHXII14:BIOMOLECULES
324563
Assertion : Acid or enzymatic hydrolysis of sucrose to give an equimolar mixture of glucose and fructose is called inversion. Reason : Sucrose is the only naturally occurring disaccharide which is reducing sugar.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Sucrose is dextrorotatory but after hydrolysis gives dextrorotatory glucose and laevorotatory fructose. Since the laevorotation of fructose \(\left(92.4^{\circ}\right)\) is more than dextrorotation of glucose \(\left(+52.5^{\circ}\right)\), the mixture is laevorotatory. Thus, hydrolysis of sucrose brings about a change in the sign of rotation, from dextro (+) to laevo \((-)\) and the product is named as invert sugar. Since the reducing groups of glucose and fructose are involved in glycosidic bond formation, sucrose is a non reducing sugar. So, option (3) is correct.
CHXII14:BIOMOLECULES
324564
Assertion : Two sugar units are joined by 1,2- glycosidic bond in sucrose Reason : It contains \(\mathrm{C}_{1}-\) glucose and \(\mathrm{C}_{2}-\) fructose glycosidic bond.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are correct.
Explanation:
Sucrose on hydrolysis gives equimolar mixture of D - \((+)\) - glucose and D - (-)-fructose. These two monosaccharides are held together by a glycosidic linkage between \(\mathrm{C}-1\) of \(\alpha-\) glucose and \(\mathrm{C}-2\) of \(\beta\) - fructose. Therefore, both Assertion and Reason are true and Reason is the correct explanation of the given Assertion.
324562
Statement A : \(\mathrm{\beta}\)-glycosidic linkage is present in maltose. Statement B : Maltose is composed of two glucose units in which C-1 of one glucose unit is linked to C-4 of another glucose unit.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Maltose is compound of two \(\mathrm{\alpha-D}\) glucose units in which \(\mathrm{\mathrm{C} 1}\) of one glucose is linked to \(\mathrm{\mathrm{C} 4}\) of another glucose unit.
CHXII14:BIOMOLECULES
324563
Assertion : Acid or enzymatic hydrolysis of sucrose to give an equimolar mixture of glucose and fructose is called inversion. Reason : Sucrose is the only naturally occurring disaccharide which is reducing sugar.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Sucrose is dextrorotatory but after hydrolysis gives dextrorotatory glucose and laevorotatory fructose. Since the laevorotation of fructose \(\left(92.4^{\circ}\right)\) is more than dextrorotation of glucose \(\left(+52.5^{\circ}\right)\), the mixture is laevorotatory. Thus, hydrolysis of sucrose brings about a change in the sign of rotation, from dextro (+) to laevo \((-)\) and the product is named as invert sugar. Since the reducing groups of glucose and fructose are involved in glycosidic bond formation, sucrose is a non reducing sugar. So, option (3) is correct.
CHXII14:BIOMOLECULES
324564
Assertion : Two sugar units are joined by 1,2- glycosidic bond in sucrose Reason : It contains \(\mathrm{C}_{1}-\) glucose and \(\mathrm{C}_{2}-\) fructose glycosidic bond.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are correct.
Explanation:
Sucrose on hydrolysis gives equimolar mixture of D - \((+)\) - glucose and D - (-)-fructose. These two monosaccharides are held together by a glycosidic linkage between \(\mathrm{C}-1\) of \(\alpha-\) glucose and \(\mathrm{C}-2\) of \(\beta\) - fructose. Therefore, both Assertion and Reason are true and Reason is the correct explanation of the given Assertion.
