Catalonia PAU Biology Practice Questions - Catalonia PAU Biology Examination - CIC Generalitat De Catalunya (Biologia 2n Batxillerat 2026) Exam

D-glucose is an aldohexose with a carbonyl group at C1, whereas D-fructose is a ketohexose with a carbonyl group at C2. D-glucose is a pentose sugar found in RNA, whereas D-fructose is a hexose sugar found in plant cell walls. D-glucose contains beta-1,4-glycosidic linkages, whereas D-fructose contains alpha-1,4-glycosidic linkages. glucose is a non-reducing sugar, whereas D-fructose cannot undergo ring closure in aqueous solution.