explain - 'cellulose is a polymeric polysaccharide consisting of only one type of monosaccharide

Cellulose is a polymeric polysaccharide which is made by beta-D-glucose units joined together by 1,4 glycosidic bond during condensation reaction. As it only cinsists of beta-D-glucose units, hence, cellulose is a polymeric polysaccharide consisting of only one type of monosaccharide.