Chapter 25, Problem 25.39P

(a)

Interpretation Introduction

Interpretation:

The monosaccharide units present in stachyose has to be named and whether they are D-monosaccharides or L-monosaccharides has to be specified.

Concept-Introduction:

The D- and L-forms of monosaccharides are given as when the monosaccharide structure is written in Fischer projection form, if the $\text{–OH}$ group at the penultimate carbon is located on right side, it is said to be D-monosaccharide and if the $\text{–OH}$ group is on left side, it is said to be L-monosaccharide.

(b)

Interpretation Introduction

Interpretation:

The glycosidic bond present in the stachyose molecule has to be identified.