Question 1

How many isomers,including stereoisomers,exist for the triacylglycerol which,on saponification,gives glycerol,2 molar equivalents of palmitate and 1 molar equivalent of stearate?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 6 
A) 1 
B) 2 
C) 3 
D) 4 
E) 6

Question 2

Show all isoprene units in the following structures:

Accepted Answer

The answer of Show all isoprene units in the following...

Question 3

Which of the following statements regarding triacylglycerols is not true?

Accepted Answer

A) They undergo alkaline hydrolysis to yield soaps. 
B) They are liquid if they have alkene groups. 
C) They are solid if they do not have one or more alkene groups. 
D) They are soluble in water. 
E) Some can be hydrogenated. 
A) They undergo alkaline hydrolysis to yield soaps. 
B) They are liquid if they have alkene groups. 
C) They are solid if they do not have one or more alkene groups. 
D) They are soluble in water. 
E) Some can be hydrogenated.

Question 4

Which of these is a wax?

Accepted Answer

A)    
B)    
C)    
D)    
E) CH3(CH2)24CH2OH 
A)    
B)    
C)    
D)    
E) CH3(CH2)24CH2OH

Question 5

Explain why oils are liquid at room temperature while fats are solid.

Accepted Answer

Triacylglycerides in oils contain cis-do

Question 6

What would be the product,X,of the following reaction sequence?

Accepted Answer

A)    
B)    
C) CH3(CH2)11CH2NH2 
D) CH3(CH2)12CONH2 
E) CH3(CH2)12COBr 
A)    
B)    
C) CH3(CH2)11CH2NH2 
D) CH3(CH2)12CONH2 
E) CH3(CH2)12COBr

Question 7

Essential oils are constituted by

Accepted Answer

A) fatty acids and glycerol 
B) triacylglycerol 
C) terpenes only 
D) glycerol 
E) terpenoids and terpenes 
A) fatty acids and glycerol 
B) triacylglycerol 
C) terpenes only 
D) glycerol 
E) terpenoids and terpenes

Question 8

In the vulcanization of rubber,

Accepted Answer

A) natural rubber is heated with sulfur. 
B) reaction occurs at allylic positions. 
C) cross-linking results in a hardening of the rubber. 
D) disulfide bridges are formed. 
E) All of these choices. 
A) natural rubber is heated with sulfur. 
B) reaction occurs at allylic positions. 
C) cross-linking results in a hardening of the rubber. 
D) disulfide bridges are formed. 
E) All of these choices.

Question 9

Draw the structures of these molecules:
a)glyceryl trimyristate
b)methyl oleate
c)α-pinene
d)dihydrocarvone

Accepted Answer

The answer of Draw the structures of these molecules:
a)glyceryl trimyristate
b)methyl...

Question 10

Which reagent might serve as the basis for a simple chemical test that would distinguish between 5$\infty$-cholest-1-en-3-one and 5$\infty$-cholestan-3-one?

Accepted Answer

A) Ag(NH3)2+ 
B) CrO3/H2SO4 
C) Br2/CCl4 
D) NaOH/H2O 
E) C6H5NHNH2 
A) Ag(NH3)2+ 
B) CrO3/H2SO4 
C) Br2/CCl4 
D) NaOH/H2O 
E) C6H5NHNH2

Question 11

When natural rubber is heated with sulfur,a reaction takes place that produces ___ between the polymer chains.This process is known as ___.

Accepted Answer

cross-link

Question 12

Which of these reagents would not react with stearic acid?

Accepted Answer

A) H2,Ni 
B) SOCl2 
C) CH3MgI 
D) NH3/H2O 
E) LAH (lithium aluminum hydride) 
A) H2,Ni 
B) SOCl2 
C) CH3MgI 
D) NH3/H2O 
E) LAH (lithium aluminum hydride)

Question 13

Which is the correct systematic name for the steroid shown below?

Accepted Answer

A) 5$\infty$-Androstan-3$\infty$-ol 
B) 5$\beta$-Androstan-3$\beta$-ol 
C) 5$\beta$-Androstan-3$\infty$-ol 
D) 5$\infty$-Androstan-3$\beta$-ol 
E) 5$\beta$-Estan-3$\beta$-ol 
A) 5$\infty$-Androstan-3$\infty$-ol 
B) 5$\beta$-Androstan-3$\beta$-ol 
C) 5$\beta$-Androstan-3$\infty$-ol 
D) 5$\infty$-Androstan-3$\beta$-ol 
E) 5$\beta$-Estan-3$\beta$-ol

Question 14

A simple triacylglycerol is one that:

Accepted Answer

A) Upon hydrolysis produces glycerol and three different fatty acids. 
B) Upon hydrolysis produces glycerol and at least two different fatty acids. 
C) Upon saponification gives glycerol and three fatty acid salts. 
D) Upon saponification gives three esters. 
E) Upon hydrolysis produces glycerol and three mol of a fatty acid. 
A) Upon hydrolysis produces glycerol and three different fatty acids. 
B) Upon hydrolysis produces glycerol and at least two different fatty acids. 
C) Upon saponification gives glycerol and three fatty acid salts. 
D) Upon saponification gives three esters. 
E) Upon hydrolysis produces glycerol and three mol of a fatty acid.

Question 15

One of the products of hydrolysis of a wax gave the following 1H NMR spectrum,ppm (integral): 3.62(2); 1.58(2),1.45(2); 1.27(50); 0.88(3).The molecular weight is 410.8 amu. What is the compound?

Accepted Answer

A) CH3(CH2)5CH2OH 
B) CH3(CH2)25CH2OH 
C) CH3(CH2)25CH2CH2OH 
D) (CH3)2CH(CH2)24CH2OH 
E) CH3(CH2)25 CH2CO2H 
A) CH3(CH2)5CH2OH 
B) CH3(CH2)25CH2OH 
C) CH3(CH2)25CH2CH2OH 
D) (CH3)2CH(CH2)24CH2OH 
E) CH3(CH2)25 CH2CO2H

Question 16

What of the following solvents would dissolve triacylglycerols?

Accepted Answer

A) Water and chloroform 
B) Acetic acid and water 
C) Chloroform and diethyl ether 
D) Aqueous NaOH and acetic acid 
E) They are soluble in water only 
A) Water and chloroform 
B) Acetic acid and water 
C) Chloroform and diethyl ether 
D) Aqueous NaOH and acetic acid 
E) They are soluble in water only

Question 17

Which fatty acid is not likely to occur commonly in natural sources?

Accepted Answer

A) Tetradecanoic acid 
B) Pentadecanoic acid 
C) Hexadecanoic acid 
D) (9Z,12Z)-octadeca-9,12-dienoic acid 
E) (Z)-hexadeca-9-enoic acid 
A) Tetradecanoic acid 
B) Pentadecanoic acid 
C) Hexadecanoic acid 
D) (9Z,12Z)-octadeca-9,12-dienoic acid 
E) (Z)-hexadeca-9-enoic acid

Question 18

The product of the following reaction sequence may be described as?

Accepted Answer

A) Alkoxyalkane 
B) Alkyl alkanoate 
C) Alkyl alkenoate 
D) Acyl glycerol 
E) Acyl Alkane 
A) Alkoxyalkane 
B) Alkyl alkanoate 
C) Alkyl alkenoate 
D) Acyl glycerol 
E) Acyl Alkane

Question 19

The 1H NMR spectrum shown is for trimyristine.Draw the structure of trimyristine and assign the signals in the spectrum to the different types of protons.Chemical shifts in ppm and integral ratios (in parentheses)are: 5.26 (1H); 4.22 (2H); 2.30 (2H); 1.61 (2H); 1.26 (20H); 0.88 (3H).

Accepted Answer

@#IMG-DLM& Assign. Shift(ppm)

Question 20

There is growing evidence that "trans" fats are associated with an increased risk of ___,and the FDA now requires "trans fat" information to be provided on nutrition labels.

Accepted Answer

cardiovasc

Exam 23: Lipids

How many isomers,including stereoisomers,exist for the triacylglycerol which,on saponification,gives glycerol,2 molar equivalents of palmitate and 1 molar equivalent of stearate?

Show all isoprene units in the following structures:

Which of the following statements regarding triacylglycerols is not true?

Which of these is a wax?

Explain why oils are liquid at room temperature while fats are solid.

What would be the product,X,of the following reaction sequence?

Essential oils are constituted by

In the vulcanization of rubber,

Draw the structures of these molecules: a)glyceryl trimyristate b)methyl oleate c)α-pinene d)dihydrocarvone

Which reagent might serve as the basis for a simple chemical test that would distinguish between 5 ∞\infty∞ -cholest-1-en-3-one and 5 ∞\infty∞ -cholestan-3-one?

When natural rubber is heated with sulfur,a reaction takes place that produces ___ between the polymer chains.This process is known as ___.

Which of these reagents would not react with stearic acid?

Which is the correct systematic name for the steroid shown below?

A simple triacylglycerol is one that:

One of the products of hydrolysis of a wax gave the following 1H NMR spectrum,ppm (integral): 3.62(2); 1.58(2),1.45(2); 1.27(50); 0.88(3).The molecular weight is 410.8 amu. What is the compound?

What of the following solvents would dissolve triacylglycerols?

Which fatty acid is not likely to occur commonly in natural sources?

The product of the following reaction sequence may be described as?

The 1H NMR spectrum shown is for trimyristine.Draw the structure of trimyristine and assign the signals in the spectrum to the different types of protons.Chemical shifts in ppm and integral ratios (in parentheses)are: 5.26 (1H); 4.22 (2H); 2.30 (2H); 1.61 (2H); 1.26 (20H); 0.88 (3H).

There is growing evidence that "trans" fats are associated with an increased risk of ___,and the FDA now requires "trans fat" information to be provided on nutrition labels.

The Basics

Families of Carbon

Acids and Bases

Nomenclature and Conformations of Alkanes and Cycloalkanes

Stereochemistry

Nucleophilic Reactions

Alkenes and Alkynes I

Alkenes and Alkynes II

Nuclear Magnetic Resonance and Mass Spectrometry

Radical Reactions

Alcohols and Ethers

Alcohols From Carbonyl Compounds

Conjugated Unsaturated Systems

Aromatic Compounds

Reactions of Aromatic Compounds

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Reactions at the Α Carbon of Carbonyl Compounds

Condensation and Conjugate Addition Reactions of Carbonyl Compounds

Amines

Transition Metal Complexes

Carbohydrates

Amino Acids and Proteins

Nucleic Acids and Protein Synthesis

Filters

Which reagent might serve as the basis for a simple chemical test that would distinguish between 5 $\infty$ -cholest-1-en-3-one and 5 $\infty$ -cholestan-3-one?

When natural rubber is heated with sulfur,a reaction takes place that produces _ between the polymer chains.This process is known as _.

One of the products of hydrolysis of a wax gave the following ¹H NMR spectrum,ppm (integral): 3.62(2); 1.58(2),1.45(2); 1.27(50); 0.88(3).The molecular weight is 410.8 amu. What is the compound?

The ¹H NMR spectrum shown is for trimyristine.Draw the structure of trimyristine and assign the signals in the spectrum to the different types of protons.Chemical shifts in ppm and integral ratios (in parentheses)are: 5.26 (1H); 4.22 (2H); 2.30 (2H); 1.61 (2H); 1.26 (20H); 0.88 (3H).