Question 1

Provide the structure for uridine.

Accepted Answer

The answer of Provide the structure for uridine....

Question 2

Which one of the following is the correct Fischer projection for D-gulose?

Accepted Answer

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

Question 3

Provide the reagents necessary to carry out the following conversion.

Accepted Answer

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

Question 4

Which of the following pairs of D-aldohexoses would produce the same product when subjected to Wohl degradation?

Accepted Answer

A)  D-glucose and D-galactose 
B)  D-mannose and D-galactose 
C)  D-glucose and D-gulose 
D)  D-allose and D-altrose 
E)  D-glucose and D-allose 
A)  D-glucose and D-galactose 
B)  D-mannose and D-galactose 
C)  D-glucose and D-gulose 
D)  D-allose and D-altrose 
E)  D-glucose and D-allose

Question 5

Which of the following statement(s) best describe the main difference between maltose and cellobiose?

Accepted Answer

A)  Maltose has a $\beta$-1-4 glycosidic linkage and cellobiose has an $\alpha$-1-4 glycosidic linkage. 
B)  Maltose is comprised of $\beta$-D-glucopyranose and cellobiose is comprised of $\alpha$-D-glucopyranose. 
C)  Maltose is comprised of $\alpha$-D-glucopyranose and cellobiose is comprised of $\beta$-D-glucopyranose. 
D)  Maltose has an $\alpha$-1-4 glycosidic linkage and cellobiose has a $\beta$-1-4 glycosidic linkage. 
E)  C and D 
A)  Maltose has a $\beta$-1-4 glycosidic linkage and cellobiose has an $\alpha$-1-4 glycosidic linkage. 
B)  Maltose is comprised of $\beta$-D-glucopyranose and cellobiose is comprised of $\alpha$-D-glucopyranose. 
C)  Maltose is comprised of $\alpha$-D-glucopyranose and cellobiose is comprised of $\beta$-D-glucopyranose. 
D)  Maltose has an $\alpha$-1-4 glycosidic linkage and cellobiose has a $\beta$-1-4 glycosidic linkage. 
E)  C and D

Question 6

When D-ribose is treated with nitric acid, it forms

Accepted Answer

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

Question 7

When D-glucose is treated with aqueous NaOH it undergoes_______.

Accepted Answer

A)  mutarotation 
B)  oxidation 
C)  glycoside formation 
D)  epimerization 
E)  none of these 
A)  mutarotation 
B)  oxidation 
C)  glycoside formation 
D)  epimerization 
E)  none of these

Question 8

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

Accepted Answer

A)  D-ribose and D-arabinose 
B)  D-glucose and D-galactose 
C)  D-altrose and D-mannose 
D)  D-galactose and D-talose 
E)  D-gulose and D-iodose 
A)  D-ribose and D-arabinose 
B)  D-glucose and D-galactose 
C)  D-altrose and D-mannose 
D)  D-galactose and D-talose 
E)  D-gulose and D-iodose

Question 9

Plants convert carbon dioxide and water into glucose in the presence of sunlight via ________.

Accepted Answer

A)  hydrolysis 
B)  retrosynthesis 
C)  Killiani synthesis 
D)  photosynthesis 
E)  none of these 
A)  hydrolysis 
B)  retrosynthesis 
C)  Killiani synthesis 
D)  photosynthesis 
E)  none of these

Question 10

Draw the chair conformation of $\alpha$-D-galactopyranose.

Accepted Answer

The answer of Draw the chair conformation of $\alpha$-D-galactopyranose....

Question 11

Identify the monosaccharide(s) in $\alpha$-maltose.

Accepted Answer

two @#LAT-DLM&-D-glu

Question 12

An optically active D-aldohexose was treated with NaBH4/H2O and 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

Which of the following disaccharides is (are) not a reducing sugar(s)?

Accepted Answer

A)  sucrose 
B)  maltose 
C)  lactose 
D)  cellobiose 
E)  None of these 
A)  sucrose 
B)  maltose 
C)  lactose 
D)  cellobiose 
E)  None of these

Question 14

What is the difference between a nucleoside and a nucleotide?

Accepted Answer

A)  A nucleotide is a phosphorylated nucleoside. 
B)  A nucleoside is a phosphorylated nucleotide. 
C)  A nucleotide is a deoxynucleoside. 
D)  A nucleoside is a deoxynucleotide. 
E)  none of these 
A)  A nucleotide is a phosphorylated nucleoside. 
B)  A nucleoside is a phosphorylated nucleotide. 
C)  A nucleotide is a deoxynucleoside. 
D)  A nucleoside is a deoxynucleotide. 
E)  none of these

Question 15

Which of the following compounds is(are) an epimer(s) of D-glucose?

Accepted Answer

A)  I 
B)  II 
C)  I and III 
D)  II andIV 
E)  I and II 
A)  I 
B)  II 
C)  I and III 
D)  II andIV 
E)  I and II

Question 16

Identify the most common aldohexose.

Accepted Answer

The answer of Identify the most common aldohexose....

Question 17

Anomers of D-fructofuranose 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 18

Which of the following is an aldopentose?

Accepted Answer

A)  D-galactose 
B)  D-fructose 
C)  D-ribose 
D)  D-glucose 
E)  D-xylulose 
A)  D-galactose 
B)  D-fructose 
C)  D-ribose 
D)  D-glucose 
E)  D-xylulose

Question 19

Draw the Fisher projection for L-glucose.

Accepted Answer

The answer of Draw the Fisher projection for L-glucose....

Question 20

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

Accepted Answer

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

Exam 24: Carbohydrates

Provide the structure for uridine.

Which one of the following is the correct Fischer projection for D-gulose?

Provide the reagents necessary to carry out the following conversion.

Which of the following pairs of D-aldohexoses would produce the same product when subjected to Wohl degradation?

Which of the following statement(s) best describe the main difference between maltose and cellobiose?

When D-ribose is treated with nitric acid, it forms

When D-glucose is treated with aqueous NaOH it undergoes_______.

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

Plants convert carbon dioxide and water into glucose in the presence of sunlight via ________.

Draw the chair conformation of α\alphaα -D-galactopyranose.

Identify the monosaccharide(s) in α\alphaα -maltose.

An optically active D-aldohexose was treated with NaBH4/H2O and 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.

Which of the following disaccharides is (are) not a reducing sugar(s)?

What is the difference between a nucleoside and a nucleotide?

Which of the following compounds is(are) an epimer(s) of D-glucose?

Identify the most common aldohexose.

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

Which of the following is an aldopentose?

Draw the Fisher projection for L-glucose.

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

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

Draw the chair conformation of $\alpha$ -D-galactopyranose.

Identify the monosaccharide(s) in $\alpha$ -maltose.

An optically active D-aldohexose was treated with NaBH₄/H₂O and 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.