Final answer:
A heteropolysaccharide is the type of polysaccharide that is not a homopolysaccharide.
Step-by-step explanation:
A homopolysaccharide is a polysaccharide that contains only one kind of monosaccharide unit. One example of a homopolysaccharide is glycogen, which is composed of α-D-glucose units. It is highly branched and serves as the storage form of energy in the human body. Other examples of homopolysaccharides include starch, cellulose, chitin, and inulin.
On the other hand, a heteropolysaccharide is a polysaccharide made up of two or more kinds of monosaccharide units. Examples of heteropolysaccharides include pectins and mucopolysaccharides.
Based on these definitions, it can be concluded that the polysaccharide that is not a homopolysaccharide is a heteropolysaccharide.