Classification of Carbohydrates Monosaccharides are classified as aldoses or ketoses -ose suffix designates a carbohydrate aldo-prefix identifies an aldehyde carbonyl group in the sugar keto-prefix identifies a ketone carbonyl group in the sugar Number of carbons indicated by the numerical prefix tri-, tetra-,pent-,hex- CH2OH Hc≥0 CH2OH C=0 H-C-OH C=0 Hc0 HO-C-H HO-C-H HO-C-H H-C-OH H-C-OH H-C-OH H-C-OH H-C-OH H-C-OH H-C-OH H-C-OH H-C-OH H-C-OH CH2OH CH2OH CH2OH CH2OH Glucose Fructose Ribose Sedoheptulose (an aldohexose) (a ketohexose) (an aldopentose】 (a ketoheptose) Monosaccharides are classified as aldoses or ketoses ▪ -ose suffix designates a carbohydrate ▪ aldo- prefix identifies an aldehyde carbonyl group in the sugar ▪ keto- prefix identifies a ketone carbonyl group in the sugar ▪ Number of carbons indicated by the numerical prefix tri-, tetra-, pent-, hex￾Classification of Carbohydrates