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Carbohydrates 1. Saccharides contain the following combination of elements: carbon, hydrogen and phosphorus carbon, nitrogen and hydrogen carbon, oxygen and hydrogen carbon and hydrogen 2. Aldoses are reducing sugars because in their non-cyclic form they contain: an aldehyde group an hydroxyl group a ketone group an ester group 3. Which is the most important carbohydrate fuel in human cells? fructose galactose glucose ribose 4. Which two monosaccharides combine to form sucrose? α-fructose and α-ribose α-glucose and β-glucose α-glucose and α-fructose α-galactose and α-fructose 5. The type of reaction that occurs when a disaccharide is formed from two monosaccharides is reduction addition hydrolysis condensation 6. The type of bond that forms when a disaccharide is formed from two monosaccharides is called: a glycosidic bond a peptide bond a carbohydrate bond an ester bond 7. The products of hydrolysis of lactose are: α-galactose and α-ribose α-fructose and α-galactose α-glucose and α-galactose α-glucose and α-fructose 8. Starch is a polymer made from the following monomer: α-fructose α-galactose α-glucose β-glucose