Question 1

Draw the Haworth structure of the α-pyranose form of the monosaccharide shown below.

Accepted Answer

The answer of Draw the Haworth structure of the α-pyranose...

Question 2

When L-(+)-idose is treated with bromine water, which of the following results?

Accepted Answer

A)  a racemic mixture of aldaric acids 
B)  an optically active aldaric acid 
C)  an optically inactive aldaric acidS 
D)  an optically active aldonic acid 
E)  an optically inactive aldonic acid 
A)  a racemic mixture of aldaric acids 
B)  an optically active aldaric acid 
C)  an optically inactive aldaric acidS 
D)  an optically active aldonic acid 
E)  an optically inactive aldonic acid

Question 3

Provide the structure of the open-chain form of D-galactose.

Accepted Answer

The answer of Provide the structure of the open-chain form...

Question 4

What is the major product of the following reaction?

Accepted Answer

A)  D-erythrose 
B)  D-arabinose 
C)  L-ribose 
D)  D-ribulose 
E)  L-threose 
A)  D-erythrose 
B)  D-arabinose 
C)  L-ribose 
D)  D-ribulose 
E)  L-threose

Question 5

A γ-Hydroxyaldehyde may cyclize to form:

Accepted Answer

A)  a hemiacetal. 
B)  an ester. 
C)  a pyrimidine. 
D)  a lactone. 
E)  a lactam. 
A)  a hemiacetal. 
B)  an ester. 
C)  a pyrimidine. 
D)  a lactone. 
E)  a lactam.

Question 6

Anomers of D-glucopyranose differ in their stereochemistry at:

Accepted Answer

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

Question 7

Draw the Fischer projection of the open chain form of L-allose.

Accepted Answer

The answer of Draw the Fischer projection of the open...

Question 8

Draw the Fischer projection for the open-chain form of D-glucose.

Accepted Answer

The answer of Draw the Fischer projection for the open-chain...

Question 9

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

Accepted Answer

A)  α-D-glucopyranose 
B)  methyl β-D-glucopyranoside 
C)  sucrose 
D)  methyl α-D-ribofuranoside 
E)  none of the above 
A)  α-D-glucopyranose 
B)  methyl β-D-glucopyranoside 
C)  sucrose 
D)  methyl α-D-ribofuranoside 
E)  none of the above

Question 10

Sucrose is hydrolyzed to what two monosaccharides?

Accepted Answer

A)  glucose and fructose 
B)  glucose and galactose 
C)  maltose and fructose 
D)  galactose and lactose 
E)  galactose and maltose 
A)  glucose and fructose 
B)  glucose and galactose 
C)  maltose and fructose 
D)  galactose and lactose 
E)  galactose and maltose

Question 11

What products would result from treating methyl α-D-fructofuranoside with periodic acid followed by hydrolysis in H3O+?

Accepted Answer

Question 12

Draw the Fischer projection for the open-chain form of D-fructose.

Accepted Answer

The answer of Draw the Fischer projection for the open-chain...

Question 13

Draw the Haworth structure of ethyl β-D-galactopyranoside.

Accepted Answer

The answer of Draw the Haworth structure of ethyl β-D-galactopyranoside....

Question 14

The open-chain form of D-lyxose is shown below. Draw the Haworth projection of methyl α-D-lyxofuranoside.

Accepted Answer

The answer of The open-chain form of D-lyxose is shown...

Question 15

Name the two pyrimidine bases which serve as components in deoxyribonucleotides.

Accepted Answer

cytosine a

Question 16

A D-aldopentose is subjected to Kiliani-Fischer chain lengthening. What products result?

Accepted Answer

A)  two aldohexoses which are epimeric at C3 
B)  two enantiomeric aldohexoses 
C)  two enantiomeric aldopentoses 
D)  two aldohexoses which are epimeric at C2 
E)  a D-aldohexose and an L-aldohexose 
A)  two aldohexoses which are epimeric at C3 
B)  two enantiomeric aldohexoses 
C)  two enantiomeric aldopentoses 
D)  two aldohexoses which are epimeric at C2 
E)  a D-aldohexose and an L-aldohexose

Question 17

L-Ribulose may be classified as ________.

Accepted Answer

A)  an aldotetrose 
B)  an aldopentose 
C)  an aldohexose 
D)  a ketotetrose 
E)  a ketopentose 
A)  an aldotetrose 
B)  an aldopentose 
C)  an aldohexose 
D)  a ketotetrose 
E)  a ketopentose

Question 18

Which of the following is a reducing sugar?

Accepted Answer

A)  α-D-fructofuranose 
B)  the methyl glycoside of cellobiose 
C)  ethyl β-D-glucopyranoside 
D)  methyl α-D-fructofuranoside 
E)  none of the above 
A)  α-D-fructofuranose 
B)  the methyl glycoside of cellobiose 
C)  ethyl β-D-glucopyranoside 
D)  methyl α-D-fructofuranoside 
E)  none of the above

Question 19

Which of the following statements is true?

Accepted Answer

A)  All monosaccharides in either the ketose of aldose family are reducing sugars. 
B)  Only aldoses, but not ketoses, are reducing sugars. 
C)  Only ketoses, but not aldoses, are reducing sugars. 
D)  All disaccharides, not monosaccharides, are reducing sugars. 
E)  All glycosides are reducing sugars. 
A)  All monosaccharides in either the ketose of aldose family are reducing sugars. 
B)  Only aldoses, but not ketoses, are reducing sugars. 
C)  Only ketoses, but not aldoses, are reducing sugars. 
D)  All disaccharides, not monosaccharides, are reducing sugars. 
E)  All glycosides are reducing sugars.

Question 20

Draw the Haworth structure of the α-pyranose form of the monosaccharide shown below.

Accepted Answer

The answer of Draw the Haworth structure of the α-pyranose...

Exam 23: Carbohydrates and Nucleic Acids

Draw the Haworth structure of the α-pyranose form of the monosaccharide shown below.

When L-(+)-idose is treated with bromine water, which of the following results?

Provide the structure of the open-chain form of D-galactose.

What is the major product of the following reaction?

A γ-Hydroxyaldehyde may cyclize to form:

Anomers of D-glucopyranose differ in their stereochemistry at:

Draw the Fischer projection of the open chain form of L-allose.

Draw the Fischer projection for the open-chain form of D-glucose.

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

Sucrose is hydrolyzed to what two monosaccharides?

What products would result from treating methyl α-D-fructofuranoside with periodic acid followed by hydrolysis in H3O+?

Draw the Fischer projection for the open-chain form of D-fructose.

Draw the Haworth structure of ethyl β-D-galactopyranoside.

The open-chain form of D-lyxose is shown below. Draw the Haworth projection of methyl α-D-lyxofuranoside.

Name the two pyrimidine bases which serve as components in deoxyribonucleotides.

A D-aldopentose is subjected to Kiliani-Fischer chain lengthening. What products result?

L-Ribulose may be classified as ________.

Which of the following is a reducing sugar?

Which of the following statements is true?

Draw the Haworth structure of the α-pyranose form of the monosaccharide shown below.

Introduction and Review

Structure and Properties of Organic Molecules

Structure and Stereochemistry of Alkanes

The Study of Chemical Reactions

Stereochemistry

Alkyl Halides: Nucleophilic Substitution and Elimination

Structure and Synthesis of Alkenes

Reactions of Alkenes

Alkynes

Structure and Synthesis of Alcohols

Reactions of Alcohols

Infrared Spectroscopy and Mass Spectrometry

Nuclear Magnetic Resonance Spectroscopy

Ethers, Epoxides, and Thioethers

Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy

Aromatic Compounds

Reactions of Aromatic Compounds

Ketones and Aldehydes

Amines

Carboxylic Acids

Carboxylic Acid Derivatives

Condensations and Alpha Substitutions of Carboxyl Compounds

Amino Acids, Peptides, and Proteins

Lipids

Synthetic Polymers

Filters

_{When L-(+)-idose is treated with}_{bromine water, which of the following results?}

_{Which of the following would give a posi}_{tive Tollen's test?}

What products would result from treating methyl α-D-fructofuranoside with periodic acid followed by hydrolysis in H₃O⁺?

_{A D-aldopentose is subjected to Kiliani-Fischer chain lengthening. What products result?}