Question 1

Which of the following monosaccharide(s) are produced when cellulose is completely hydrolyzed?

Accepted Answer

A)  . α\alphaα -D-glucose
B)  . β\betaβ -D-glucose
C)  . α\alphaα -D-galactose
D)  . β\betaβ -D-fructose
E)  maltose F) B) and E)
G) D) and E)

Question 2

What is the difference between a nucleoside and a nucleotide?

Accepted Answer

A)  nucleotide is a phosphorylated nucleoside
B)  nucleoside is a phosphorylated nucleotide
C)  nucleotide is a deoxynucleoside
D)  nucleoside is a deoxynucleotide
E)  none of theseF) A) and D)
G) A) and B)

Question 3

Which of the following is (are) D-aldopentose(s) ?

Accepted Answer

A)  I
B)  II
C)  III
D)  IV
E)  I & VF) B) and E)
G) C) and D)

Question 4

Predict the product(s) for the following reaction.

Accepted Answer

A)  I
B)  II
C)  III
D)  IV
E)  VF) B) and C)
G) B) and E)

Question 5

Which of the following is a ketopentose?

Accepted Answer

A)  D-lyxose
B)  D-fructose
C)  D-ribose
D)  D-glucose
E)  D-xyluloseF) D) and E)
G) C) and D)

Question 6

Which of the following best describes L-xylulose?

Accepted Answer

A)  aldopentose
B)  aldohexose
C)  ketopentose
D)  ketohexose
E)  aldotetroseF) A) and B)
G) None of the above

Question 7

Which of the following best describes the relationship between D-glucose and D-galactose?

Accepted Answer

A)  enantiomers
B)  anomers
C)  epimers
D)  constitutional isomers
E)  none of theseF) A) and B)
G) C) and D)

Question 8

What is the correct name for the following compound?

Accepted Answer

A)  . α\alphaα -D-fructofuranose
B)  . β\betaβ -D-sorbofuranose
C)  . α\alphaα -D-glucopyranose
D)  . β\betaβ -D- fructofuranose
E)  . β\betaβ -D-gulopyranose F) A) and B)
G) C) and E)

Question 9

Provide the reagents necessary to carry out the following conversion.

Accepted Answer

The answer of Provide the reagents necessary to carry out...

Question 10

Which of the following compounds is a pair of enantiomers?

Accepted Answer

A)  I & III
B)  II & IV
C)  III & V
D)  IV
E)  none of theseF) A) and B)
G) B) and E)

Question 11

Predict the product(s) for the following Kiliani-Fischer synthesis.

Accepted Answer

A)  D-ribose & D-arabinose
B)  D-glucose & D-galactose
C)  D-altose & D-mannose
D)  D-galactose & D-talose
E)  D-gulose & D-iodoseF) B) and E)
G) B) and D)

Question 12

An optically active D-aldohexose was treated with NaBH4/H2O it produced an optically inactive alditol.When the same D-aldohexose was subjected to Wohl degradation followed by HNO3 it produced an optically inactive aldaric acid.Provide the structure of this D-aldohexose.

Accepted Answer

Question 13

Predict the product(s)when lactose is treated with Br2/H2O.

Accepted Answer

Question 14

Predict the product(s) for the following Wohl degradation.

Accepted Answer

A)  I
B)  II
C)  III
D)  IV
E)  VF) None of the above
G) All of the above

Question 15

The main difference between cellulose and chitin is that:

Accepted Answer

A)  Cellulose has  β\betaβ -glycosidic linkages;chitin has  α\alphaα -glycosidic linkages
B)  Cellulose has α\alphaα -glycosidic linkages;chitin has  β\betaβ -glycosidic linkages
C)  Cellulose contains D-glucose units;chitin contains N-acetyl derivative of glucosamine
D)  Cellulose has a linear structure,chitin has helical structure
E)  Cellulose has 1,6 branching,chitin has no branching F) A) and B)
G) A) and C)

Question 16

Provide the reactant(s)for the following reaction.

Accepted Answer

The answer of Provide the reactant(s)for the following reaction. ...

Question 17

Which of the following compound(s) would give a positive Tollen's test?

Accepted Answer

A)  I
B)  II
C)  III
D)  IV
E)  I & IIF) A) and C)
G) C) and D)

Question 18

How many stereoisomers are possible for L-galactose?

Accepted Answer

A)  8
B)  6
C)  10
D)  3
E)  4F) None of the above
G) A) and B)

Question 19

Predict the product(s)when cellobiose is treated with excess acetic anhydride/pyridine.

Accepted Answer

The answer of Predict the product(s)when cellobiose is treated with...

Question 20

Which of the following best describes the relationship between D-glucose and D-fructose?

Accepted Answer

A)  enantiomers
B)  epimers
C)  anomers
D)  constitutional isomers
E)  diastereomersF) A) and B)
G) B) and E)

Exam 24: Carbohydrates

Which of the following best describes the relationship between D-glucose and D-galactose?

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Predict the product(s)when cellobiose is treated with excess acetic anhydride/pyridine.

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How many stereoisomers are possible for L-galactose?

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What is the difference between a nucleoside and a nucleotide?

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Predict the product(s)when lactose is treated with Br2/H2O.

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The main difference between cellulose and chitin is that:

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Which of the following compounds is a pair of enantiomers?

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Which of the following is a ketopentose?

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Which of the following monosaccharide(s) are produced when cellulose is completely hydrolyzed?

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Which of the following best describes the relationship between D-glucose and D-fructose?

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What is the correct name for the following compound?

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Provide the reactant(s)for the following reaction.

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Which of the following best describes L-xylulose?

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An optically active D-aldohexose was treated with NaBH4/H2O it produced an optically inactive alditol.When the same D-aldohexose was subjected to Wohl degradation followed by HNO3 it produced an optically inactive aldaric acid.Provide the structure of this D-aldohexose.

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Which of the following compound(s) would give a positive Tollen's test?

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Predict the product(s) for the following Kiliani-Fischer synthesis.

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Provide the reagents necessary to carry out the following conversion.

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Predict the product(s) for the following reaction.

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Which of the following is (are) D-aldopentose(s) ?

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Predict the product(s) for the following Wohl degradation.

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Predict the product(s)when lactose is treated with Br₂/H₂O.

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What is the correct name for the following compound? $What is the correct name for the following compound? A) . \alpha -D-fructofuranose B) . \beta -D-sorbofuranose C) . \alpha -D-glucopyranose D) . \beta -D- fructofuranose E) . \beta -D-gulopyranose$

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An optically active D-aldohexose was treated with NaBH₄/H₂O it produced an optically inactive alditol.When the same D-aldohexose was subjected to Wohl degradation followed by HNO₃ it produced an optically inactive aldaric acid.Provide the structure of this D-aldohexose.

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