Question 1

All naturally occurring sugars can be degraded to ________.

Accepted Answer

A)  D-(-)-glyceraldehyde 
B)  D-(+)-glyceraldehyde 
C)  L-(-)-glyceraldehyde 
D)  L-(+)-glyceraldehyde 
E)  none of the above 
A)  D-(-)-glyceraldehyde 
B)  D-(+)-glyceraldehyde 
C)  L-(-)-glyceraldehyde 
D)  L-(+)-glyceraldehyde 
E)  none of the above

Question 2

Draw the Haworth structure of α-D-ribofuranose.

Accepted Answer

The answer of Draw the Haworth structure of α-D-ribofuranose....

Question 3

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

Accepted Answer

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

Question 4

Draw the Haworth structure of the β-furanose form of the monosaccharide shown below.

Accepted Answer

The answer of Draw the Haworth structure of the β-furanose...

Question 5

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 6

Under what conditions is the methyl glycoside of galactose hydrolyzed?

Accepted Answer

The answer of Under what conditions is the methyl glycoside...

Question 7

Draw the cyclic hemiacetal form of D-glucose both as a chair conformation and as a Haworth projection.

Accepted Answer

The answer of Draw the cyclic hemiacetal form of D-glucose...

Question 8

Treatment of a monosaccharide with silver oxide and excess methyl iodide will ________.

Accepted Answer

A)  methylate all hydroxyl groups present 
B)  cleave the sugar between C5 and C6 
C)  cleave the sugar between C1 and C6 
D)  methylate only the hydroxyl at C1 
E)  form the disaccharide 
A)  methylate all hydroxyl groups present 
B)  cleave the sugar between C5 and C6 
C)  cleave the sugar between C1 and C6 
D)  methylate only the hydroxyl at C1 
E)  form the disaccharide

Question 9

Draw the Fischer projection of (2S,3R)-2,3-dihydroxybutanoic acid, and label it as erythro or threo.

Accepted Answer

The answer of Draw the Fischer projection of (2S,3R)-2,3-dihydroxybutanoic acid,...

Question 10

Provide the structure of guanosine.

Accepted Answer

The answer of Provide the structure of guanosine....

Question 11

Most monosaccharides are highly water soluble. Offer an explanation.

Accepted Answer

The presence of a large number

Question 12

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 13

How many molecules of carbon dioxide and water are needed to make a molecule of glucose in photosynthesis?

Accepted Answer

A)  5 CO2 and 5 H2O 
B)  5 CO2 and 6 H2O 
C)  6 CO2 and 6 H2O 
D)  6 CO2 and 2 H2O 
E)  2 CO2 and 2 H2O 
A)  5 CO2 and 5 H2O 
B)  5 CO2 and 6 H2O 
C)  6 CO2 and 6 H2O 
D)  6 CO2 and 2 H2O 
E)  2 CO2 and 2 H2O

Question 14

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 acid 
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 acid 
D)  an optically active aldonic acid 
E)  an optically inactive aldonic acid

Question 15

In the Fischer projection of D-(+)-glyceraldehyde, the hydroxyl group on the asymmetric carbon center is ________.

Accepted Answer

A)  on the bottom 
B)  on the top 
C)  at the left 
D)  at the right 
E)  present as a hemiacetal 
A)  on the bottom 
B)  on the top 
C)  at the left 
D)  at the right 
E)  present as a hemiacetal

Question 16

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

Accepted Answer

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

Question 17

Draw the Fischer projection of the open chain form of D-arabinose.

Accepted Answer

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

Question 18

How many asymmetric centers are present in the open chain form of the aldohexose D-(-)-gulose?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  4 
E)  5 
A)  0 
B)  1 
C)  2 
D)  4 
E)  5

Question 19

Which structure is deoxycytidine monophosphate?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 20

What two D-aldohexoses result when D-arabinose is subjected to the Kiliani-Fischer synthesis?

Accepted Answer

D-glucose

Exam 23: Carbohydrates and Nucleic Acids

All naturally occurring sugars can be degraded to ________.

Draw the Haworth structure of α-D-ribofuranose.

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

Draw the Haworth structure of the β-furanose form of the monosaccharide shown below.

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

Under what conditions is the methyl glycoside of galactose hydrolyzed?

Draw the cyclic hemiacetal form of D-glucose both as a chair conformation and as a Haworth projection.

Treatment of a monosaccharide with silver oxide and excess methyl iodide will ________.

Draw the Fischer projection of (2S,3R)-2,3-dihydroxybutanoic acid, and label it as erythro or threo.

Provide the structure of guanosine.

Most monosaccharides are highly water soluble. Offer an explanation.

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

How many molecules of carbon dioxide and water are needed to make a molecule of glucose in photosynthesis?

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

In the Fischer projection of D-(+)-glyceraldehyde, the hydroxyl group on the asymmetric carbon center is ________.

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

Draw the Fischer projection of the open chain form of D-arabinose.

How many asymmetric centers are present in the open chain form of the aldohexose D-(-)-gulose?

Which structure is deoxycytidine monophosphate?

What two D-aldohexoses result when D-arabinose is subjected to the Kiliani-Fischer synthesis?

Structure and Bonding

Acids and Bases; Functional Groups

Structure and Stereochemistry of Alkanes

The Study of Chemical Reactions

Stereochemistry

Alkyl Halides; Nucleophilic Substitution

Structure and Synthesis of Alkenes; Elimination

Reactions of Alkenes

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

_{Which of the following would give}_{a positive Tollen's}_test?