Ncert Exercises & Solutions

Given below are two statements:

Assertion (A):	β -Glycosidic linkage is present in maltose.
Reason (R):	Maltose is composed of two glucose units in which C1 of one glucose unit is linked to C4 of another glucose unit.

1.	(A) and (R) both are correct statements and (R) explain the (A).
2.	(A) and (R) both are correct statements but (R) does not explain (A).
3.	(A) is the correct statement and (R) is the wrong statement.
4.	(A) is the wrong statement and (R) is the correct statement.

Hint:

α

-glycosidic linkage is present in maltose

Maltose is a disaccharide of glucose. In maltose,

α

-glycosidic linkage is present. The structure is as follows:

Because maltose is composed of two glucose units in which C-1 of one glucose unit is linked to C-4 of another glucose unit.

Hence, Assertion is the wrong statement and reason is the correct statement.

An alpha glycosidic linkage is formed between the carbons with the same stereochemistry. A beta glycosidic linkage is formed between the carbons having different stereochemistry.

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