A-LevelBiologyBiological molecules9700/12 · Feb/Mar 2025 · Q121 Mark
Galactogen is a storage polysaccharide in some animal species. It is a branched polymer that is formed from ẞ-galactose monomers. Which comparison of galactogen with another polysaccharide correctly summarises one similarity and one difference?
AGlycogen and galactogen are both branched, but glycogen is not a storage polysaccharide in animals.
BGlycogen and galactogen are both storage polysaccharides in animals, but glycogen is unbranched.
CCellulose and galactogen are both branched, but cellulose is a structural polysaccharide found in plants.
DAmylopectin and galactogen are both storage polysaccharides, but amylopectin is formed from α-glucose monomers.
✓ Correct answer
D: Amylopectin and galactogen are both storage polysaccharides, but amylopectin is formed from α-glucose monomers.
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