Answer
$Oligosaccharides;$ $1)$ their sub-units can be combined in more ways than the amino acid sub-units of oligopeptides.
$2)$ Each hydroxal group can participates in $glycosidic bonds$, and the configuration of each glycosidic bond can be either $Alfha$ or $Beta$.
$3)$The polymer can be linear or branched.
Work Step by Step
These features of oligosaccharide chains enables the polymer to exist in a variety of forms.
