The structure of D-arabinose is shown below. How many stereoisomers are possible for this molecule (including the one shown)? H. но-с-н H-C-OH H-C-OH CH,OH D-Arabinose One A. Four В. Six OC. OD. Eight
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- The synthetic process by which monomers are covalently linked is (a) hydrolysis (b) isomerization (c) condensation (d) glycosidic linkage (e) ester linkageHow many stereoisomers are possible for D-xylulose? A) 10 B) 6 C) 8 D) 4If a monosaccharide undergoes a cyclization reaction, how do you determine the alpha and beta designation of the new product? A.check if there is a new asymmetric carbon B. L and D isoform is used as the linear reactant C. whether the C5 hydroxyl group attacks the front or back of the anomeric carbon D. whether the majority of the hydroxyl groups are above or below the plane of the ring
- Why can a monosaccharide theoretically form diverse disaccharides? a. Because it is classified as an aldose or ketoseb. Because it is a right-handed moleculec. Because it has multiple hydroxyl groups that can form glycosidic bond.d. Because it has several carbonyl groups that can form glycosidic bond.Draw an aspartic acid and label: a. The acarbon, aamino, and acarboxyl groups (you can use the chart at the end of the exam for the R group). b. At pH=11, what would be the overall charge on aspartic acid in solution? You can use the short-hand rule...Amylopectin has which of the following structural features? a. only α(1,4) glycosidic linkages b. only β(1,4) glycosidic linkages c. both α(1,4) and α(1,6) glycosidic linkages d. both α(1,4) and β(1,6) glycosidic linkages
- A monosaccharide designated as an aldehyde sugar contains(a) a terminal carboxyl group (b) an internal carboxyl group(c) a terminal carbonyl group (d) an internal carbonyl group(e) a terminal carboxyl group and an internal carbonyl groupWhich of the following describes lactose? A. A nonreducing disaccharide containing glucose and fructose linked by a (α1-->4) bond. B. A reducing disaccharide containing two glucose molecules linked by a (α1-->4) bond. C. A reducing disaccharide containing two glucose molecules linked by a (β1-->4) bond. D. A reducing disaccharide containing galactose and glucose linked by a (β1-->4) bond. E. A nonreducing disaccharide containing galactose and glucose linked by a (α1-->4) bond.Which of the following statements about monosaccharides is true? A. Monosaccharides are classified according to the location of their carbonyl group. B. The penultimate chiral center of a monosaccharide determines its handedness. C. If the carbonyl group of a monosaccharide is terminal then it will react positively with Barfoed's and Seliwanoff's tests. D. The cyclization of monosaccharides results to the formation of a cyclic ether. E. The existence of anomers is due to the mutarotation along the reference carbon
- Given the structure of disaccharide below: (a) is it reducing? (b) will it react positively with Benedict's reagent and (c) what specific glycosidic linkage is the name of the disaccharide?Which of the following are saponifiable lipids? (Recall that ester bonds are broken by base hydrolysis.)(a) Progesterone (b) Glyceryl trioleate(c) A sphingomyelin (d) Prostaglandin E1(e) A cerebroside (f) A lecithinAn octapeptide composed of four repeating glycylalanyl units has ___. A. one free amino group on the glycyl residue and one free carboxyl group on a alanyl residue B. two free carboxyl groups, both on the glycyl residues C. two free amino groups, both on alanyl residue she D. one free amino group on the alanyl residue and one free carboxyl group on a glycyl residue