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Name the following structure. Name the following structure. A) amylopectin B) amylose C) lactose D) cellulose E) starch


A) amylopectin
B) amylose
C) lactose
D) cellulose
E) starch

F) A) and E)
G) C) and D)

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An optically active D-aldopentose produced an optically inactive aldaric acid upon treatment with HNO3.When this aldopentose was subjected to a Ruff degradation,a D-aldotetrose was generated.This aldotetrose gave an optically inactive alditol upon reduction with NaBH4.Use these data to provide the structure of the starting D-aldopentose.

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How many chirality centers are there in a 2-ketohexose?


A) 2
B) 3
C) 4
D) 5
E) 6

F) B) and C)
G) A) and E)

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Fructose is described as a(n)


A) aldopentose.
B) ketopentose.
C) aldohexose.
D) ketohexose.
E) none of the above.

F) B) and D)
G) None of the above

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Which of the following statements best describes the difference between amylose and amylopectin?


A) Amylose is a branched polysaccharide while amylopectin is a chain polysaccharide.
B) Amylose is a straight-chain polysaccharide while amylopectin is a branched polysaccharide.
C) Amylose contains α-1,6-glycosidic linkage which amylopectin does not contain.
D) Amylose is composed of thousands of D-glucose units while amylopectin is composed of thousands of D-galactose units.
E) Amylose is one of the largest molecules found in nature while amylopectin is one of the smallest molecules found in nature.

F) B) and C)
G) C) and E)

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An optically active D-aldopentose produced an optically inactive alditol upon treatment with NaBH4.When this aldopentose was subjected to a Ruff degradation,a D-aldotetrose was generated.This aldotetrose gave an optically active aldaric acid upon oxidation with HNO3.Use these data to provide the structure of the starting D-aldopentose.

Correct Answer

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Give the product(s)for each step of the following reaction. Give the product(s)for each step of the following reaction.

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What nucleophilic carbon species is used in the Kiliani-Fischer synthesis?

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Anomers of D-glucopyranose differ in their stereochemistry at


A) C1.
B) C2.
C) C3.
D) C4.
E) C5.

F) B) and E)
G) All of the above

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When D-threose is treated with NaBH4


A) a 70:30 mixture of enantiomeric alditols results.
B) a 50:50 mixture of enantiomeric alditols results.
C) a meso alditol is produced.
D) the product mixture contains two diastereomeric alditols.
E) an optically active alditol is produced.

F) B) and D)
G) C) and E)

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When α-D-xylofuranose is treated with excess methyl iodide in the presence of Ag2O,how many equivalents of methyl iodide react with each equivalent of the furanose?


A) 0
B) 1
C) 4
D) 5
E) 6

F) A) and B)
G) C) and E)

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Draw the enolate of D-glucose. Draw the enolate of D-glucose.

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The open-chain form of D-idose is shown below.Draw the Haworth projection of b-D-idopyranose. The open-chain form of D-idose is shown below.Draw the Haworth projection of b-D-idopyranose.

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Provide the Haworth projection of ethyl-β-D-mannopyranoside.

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Which of the following represents a glycosidic bond? Which of the following represents a glycosidic bond? A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

F) A) and E)
G) A) and D)

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Give the common name for the following structure. Give the common name for the following structure.

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a-D-glucop...

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Given the structure of D-arabinose below,provide the structure of the glycoside methyl α-D-arabinofuranoside. Given the structure of D-arabinose below,provide the structure of the glycoside methyl α-D-arabinofuranoside.

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Give the name for the following structure. Give the name for the following structure.

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Which of the following is true about sucrose?


A) It hydrolyzes to fructose and glucose.
B) It is a reducing sugar.
C) It is a monosaccharide.
D) It undergoes mutorotation in water.

E) A) and B)
F) A) and C)

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Give the major product(s) for the following reaction. Give the major product(s) for the following reaction. A) no reaction B) C) D) E)


A) no reaction
B) Give the major product(s) for the following reaction. A) no reaction B) C) D) E)
C) Give the major product(s) for the following reaction. A) no reaction B) C) D) E)
D) Give the major product(s) for the following reaction. A) no reaction B) C) D) E)
E) Give the major product(s) for the following reaction. A) no reaction B) C) D) E)

F) A) and E)
G) B) and C)

Correct Answer

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