Compare the structures of starch and cellulose.

both are polymers of glucose / both contain glycosidic linkages;

starch is formed from $\alpha$-glucose / can have $\alpha$-1,6 linkages (and $\alpha$-1,4 linkages) / amylopectin form is branched;

cellulose is formed from $\beta$-glucose/has $\beta$-1,4 linkages / does not have 1,6 linkages / is not branched / is only straight-chain;

Many candidates had some idea of the α-glucose and β-glucose origins of starch and cellulose respectively, but it was disappointing to see weak answers where candidates compared other features/properties, such as digestibility or solubility, instead of comparing the structures as it was asked for.