Question 1

Of the possible stereoisomers for glucose, how many are D-isomers?

Accepted Answer

A)  8 
B)  6 
C)  10 
D)  3 
E)  4 
A)  8 
B)  6 
C)  10 
D)  3 
E)  4

Question 2

What is the correct Haworth projection for $\beta$-D-allopyranose?

Accepted Answer

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

Question 3

Predict the major product for the following reaction.

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  none of these 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  none of these

Question 4

When D-threose is treated with NaBH4/H2O, it forms _______.

Accepted Answer

A)  a racemic mixture of alditols 
B)  a meso alditol 
C)  an optically active alditol 
D)  an optically active aldonic acid 
E)  none of these 
A)  a racemic mixture of alditols 
B)  a meso alditol 
C)  an optically active alditol 
D)  an optically active aldonic acid 
E)  none of these

Question 5

Which carbon in the following monosaccharide is the anomeric carbon?

Accepted Answer

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

Question 6

Degradation of naturally occurring glucose produces _________ that is ________.

Accepted Answer

A)  D-glyceraldehyde, dextrorotatory 
B)  D-glyceraldehyde, levorotatory 
C)  L-glyceraldehyde, dextrorotatory 
D)  L-glyceraldehyde, levorotatory 
E)  none of these 
A)  D-glyceraldehyde, dextrorotatory 
B)  D-glyceraldehyde, levorotatory 
C)  L-glyceraldehyde, dextrorotatory 
D)  L-glyceraldehyde, levorotatory 
E)  none of these

Question 7

Which of the following disaccharides is(are) $\alpha$-glucoside(s)?

Accepted Answer

A)  sucrose 
B)  maltose 
C)  lactose 
D)  cellobiose 
E)  both A and B 
A)  sucrose 
B)  maltose 
C)  lactose 
D)  cellobiose 
E)  both A and B

Question 8

Which of the following compounds are a pair of enantiomers?

Accepted Answer

A)  I and III 
B)  II and IV 
C)  III and V 
D)  IV 
E)  none of these 
A)  I and III 
B)  II and IV 
C)  III and V 
D)  IV 
E)  none of these

Question 9

Which of the following aldohexoses is dextrorotatory?

Accepted Answer

A)  D-glucose 
B)  D-galactose 
C)  D-gulose 
D)  D-mannose 
E)  cannot predict 
A)  D-glucose 
B)  D-galactose 
C)  D-gulose 
D)  D-mannose 
E)  cannot predict

Question 10

D-glucose and D-galactose are ______ epimers of each other.

Accepted Answer

A)  C-1 
B)  C-2 
C)  C-3 
D)  C-4 
E)  C-5 
A)  C-1 
B)  C-2 
C)  C-3 
D)  C-4 
E)  C-5

Question 11

Raffinose is a trisaccharide found in whole grains. What is the correct description of the glycosidic linkage(s) in raffinose?

Accepted Answer

A)  (1$\to$6 $\alpha$ at galactose and glucose and 1$\to$1 $\alpha$ at glucose and fructose) 
B)  (1$\to$4 $\alpha$ at galactose and glucose and 1$\to$1 $\alpha$ at glucose and fructose) 
C)  (1$\to$ 6 $\alpha$ at galactose and glucose and 1$\to$6 $\alpha$ at glucose and fructose) 
D)  (1$\to$6 $\beta$ at galactose and glucose and 1$\to$1 $\beta$ at glucose and fructose) 
E)  (1$\to$4 $\beta$ at galactose and glucose and 1$\to$1 $\beta$ at glucose and fructose) 
A)  (1$\to$6 $\alpha$ at galactose and glucose and 1$\to$1 $\alpha$ at glucose and fructose) 
B)  (1$\to$4 $\alpha$ at galactose and glucose and 1$\to$1 $\alpha$ at glucose and fructose) 
C)  (1$\to$ 6 $\alpha$ at galactose and glucose and 1$\to$6 $\alpha$ at glucose and fructose) 
D)  (1$\to$6 $\beta$ at galactose and glucose and 1$\to$1 $\beta$ at glucose and fructose) 
E)  (1$\to$4 $\beta$ at galactose and glucose and 1$\to$1 $\beta$ at glucose and fructose)

Question 12

Which one of the following is a correct structure for $\beta$-cellobiose?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  none of these 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  none of these

Question 13

The general structure of carbohydrates are _______.

Accepted Answer

A)  polyhydroxy esters 
B)  polyhydroxy aldehydes 
C)  polyhydroxy ketones 
D)  polyhydroxy alkanes 
E)  B and C 
A)  polyhydroxy esters 
B)  polyhydroxy aldehydes 
C)  polyhydroxy ketones 
D)  polyhydroxy alkanes 
E)  B and C

Question 14

Anomers of D-glucopyranose differ in stereochemistry at ____ carbon.

Accepted Answer

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

Question 15

Which of the following compound(s) would NOT undergo mutarotation in aqueous solution?

Accepted Answer

A)  I 
B)  II and IV 
C)  III 
D)  IV 
E)  II, III and IV 
A)  I 
B)  II and IV 
C)  III 
D)  IV 
E)  II, III and IV

Question 16

Identify the monomer in cellulose.

Accepted Answer

A)  ($\alpha$-D-glucose) 
B)  ($\beta$-D-glucose) 
C)  ($\alpha$-D-galactose) 
D)  ($\beta$-D-fructose) 
E)  maltose 
A)  ($\alpha$-D-glucose) 
B)  ($\beta$-D-glucose) 
C)  ($\alpha$-D-galactose) 
D)  ($\beta$-D-fructose) 
E)  maltose

Question 17

What is the correct name for the following compound?

Accepted Answer

A)  ($\alpha$-D-idopyranose) 
B)  ($\beta$-D-altopyranose) 
C)  ($\beta$-D-glucopyranose) 
D)  ($\alpha$-D-galactopyranose) 
E)  ($\beta$-D-gulopyranose) 
A)  ($\alpha$-D-idopyranose) 
B)  ($\beta$-D-altopyranose) 
C)  ($\beta$-D-glucopyranose) 
D)  ($\alpha$-D-galactopyranose) 
E)  ($\beta$-D-gulopyranose)

Question 18

Identify the classification for D-galactose.

Accepted Answer

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

Question 19

Which of the following best describes the relationship between $\alpha$-D-glucopyranose and $\beta$-D-glucopyranose?

Accepted Answer

A)  enantiomers 
B)  anomers 
C)  diastereomers 
D)  constitutional isomers 
E)  none of these 
A)  enantiomers 
B)  anomers 
C)  diastereomers 
D)  constitutional isomers 
E)  none of these

Question 20

Of the possible stereoisomers for fructose, how many are D-isomers?

Accepted Answer

A)  8 
B)  6 
C)  10 
D)  2 
E)  4 
A)  8 
B)  6 
C)  10 
D)  2 
E)  4

Exam 24: Carbohydrates

Of the possible stereoisomers for glucose, how many are D-isomers?

What is the correct Haworth projection for β\betaβ -D-allopyranose?

Predict the major product for the following reaction.

When D-threose is treated with NaBH4/H2O, it forms _______.

Which carbon in the following monosaccharide is the anomeric carbon?

Degradation of naturally occurring glucose produces _________ that is ________.

Which of the following disaccharides is(are) α\alphaα -glucoside(s)?

Which of the following compounds are a pair of enantiomers?

Which of the following aldohexoses is dextrorotatory?

D-glucose and D-galactose are ______ epimers of each other.

Raffinose is a trisaccharide found in whole grains. What is the correct description of the glycosidic linkage(s) in raffinose?

Which one of the following is a correct structure for β\betaβ -cellobiose?

The general structure of carbohydrates are _______.

Anomers of D-glucopyranose differ in stereochemistry at ____ carbon.

Which of the following compound(s) would NOT undergo mutarotation in aqueous solution?

Identify the monomer in cellulose.

What is the correct name for the following compound?

Identify the classification for D-galactose.

Which of the following best describes the relationship between α\alphaα -D-glucopyranose and β\betaβ -D-glucopyranose?

Of the possible stereoisomers for fructose, how many are D-isomers?

A Review of General Chemistry: Electrons, Bonds, and Molecular Properties

Molecular Representations

Acids and Bases

Alkanes and Cycloalkanes

Stereoisomerism

Chemical Reactivity and Mechanisms

Alkyl Halides: Nucleophilic Substitution and Elimination Reactions

Addition Reactions of Alkenes

Alkynes

Radical Reactions

Synthesis

Alcohols and Phenols

Ethers and Epoxides; Thiols and Sulfides

Infrared Spectroscopy and Mass Spectrometry

Nuclear Magnetic Resonance Spectroscopy

Conjugated Pi Systems and Pericyclic Reactions

Aromatic Compounds

Aromatic Substitution Reactions

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Alpha Carbon Chemistry: Enols and Enolates

Amines

Introduction to Organometallic Compounds

Amino Acids, Peptides, and Proteins

Lipids

Synthetic Polymers

Filters

What is the correct Haworth projection for $\beta$ -D-allopyranose? $What is the correct Haworth projection for \beta -D-allopyranose?$ $What is the correct Haworth projection for \beta -D-allopyranose?$ $What is the correct Haworth projection for \beta -D-allopyranose?$

When D-threose is treated with NaBH₄/H₂O, it forms _______.

Degradation of naturally occurring glucose produces _ that is .

Which of the following disaccharides is(are) $\alpha$ -glucoside(s)?

Which one of the following is a correct structure for $\beta$ -cellobiose? $Which one of the following is a correct structure for \beta -cellobiose?$ $Which one of the following is a correct structure for \beta -cellobiose?$

Which of the following best describes the relationship between $\alpha$ -D-glucopyranose and $\beta$ -D-glucopyranose?