Biochem Module 4 Exam Question and Answers 2023

Biochem Module 4 Exam Question and Answers 2023 which of the following monosaccharides is not an aldose? a. erythrose b. dihydroxyacetone c. glucose d. glyceraldehyde e. ribose Ans- b. dihydroxyacetone when two monosaccharides are epimers: a. they differ only in the configuration about the penultimate carbon b. one is an aldose, the other a ketose c. they differ only in the configuration about one carbon atom d. they form o-glycosidic bonds e. they are oligosaccharides Ans- c. they differ only in the configuration about one carbon atom which pair is anomeric? a. D-glucose and D-fructose b. D-glucose and L-fructose c. D-glucose and L-glucose d. alpha-D-glucose and beta-D-fructose e. alpha-D-glucose and beta-D-glucose Ans- e. alpha-D-glucose and beta-D-glucose lactose is made from linking galactose and glucose. when this happens: a. a polysaccharide is formed b. gas is eliminated c. an epimer is formed d. an anomeric carbon is formed on carbon-1 e. lactose forms by a condensation reaction Ans- e. lactose forms by a condensation reaction lactose is made from linking galactose and glucose. when this happens: a. gas is eliminated b. an anomeric carbon is formed on carbon-1 c. water is released d. an epimer is formed e. an aldose is formed Ans- c. water is released chitin and cellulose are both polymers of: a. alpha-D-glucose b. galactose c. beta-D-glucose d. idose e. maltose Ans- c. beta-D-glucose *starch, glycogen, amylose, and amylopectin = alpha-D-glucose amylose and amylopectin are both polymers of: a. alpha-D-glucose b. beta-D-glucose c. galactose d. idose e. maltose Ans- a. alpha-D-glucose *cellulose and chitin = beta-D-glucose *starch, glycogen, amylose, and amylopectin = alpha-D-glucose which statement about starch and glycogen is false? a. amylose is unbranched; amylopectin and glycogen contain many branches b. both are heteropolymers of glucose c. both have many -OH groups in their structures d. both starch and glycogen are energy storage polysaccharides e. glycogen is more extensively branched than starch Ans- b. both are heteropolymers of glucose which statement about starch and glycogen is false? a. both have beta-D-glucose monomers b. both starch and glycogen are energy storage polysaccharides c. both are homopolymers of glucose d. glycogen is more extensively branched that starch e. both have O-glycosidic linkages Ans- a. both have beta-D-glucose mono