Question

Which one of the following statements is true?
In maltose, two glucose molecules are linked by B (1–4) glycosidic linkage
In maltose, two glucose molecules are linked by B (1-6) glycosidic linkage
In isomaltose, two glucose molecules are linked by a (1-6) glycosidic linkage
In isomaltose, two glucose molecules are linked by a (1–4) glycosidic linkage
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Answer 1

Answer:

2.

3.

4.

The following reactions of glucose cannot be explained by its open-chain structure.

Aldehydes give 2, 4-DNP test, Schiff’s test, and react with NaHSO3 to form the hydrogen sulphite addition product. However, glucose does not undergo these reactions.

The penta-acetate of glucose does not react with hydroxylamine. This indicates that a free −CHO group is absent from glucose