Question 1

What is an undesired effect of the partial hydrogenation of oils?

Accepted Answer

A) The oil gets very liquidly 
B) The oil gets transformed into a brittle solid 
C) The oil gets solid but the remaining double bonds are all in cis stereochemistry 
D) Some double bonds are isomerized to trans stereochemistry 
E) All the double bonds are hydrogenated and the fatty acids become fully saturated 
A) The oil gets very liquidly 
B) The oil gets transformed into a brittle solid 
C) The oil gets solid but the remaining double bonds are all in cis stereochemistry 
D) Some double bonds are isomerized to trans stereochemistry 
E) All the double bonds are hydrogenated and the fatty acids become fully saturated

Question 2

The biosynthesis of one series of prostaglandins begins with which of these fatty acids?

Accepted Answer

A) Palmitic acid 
B) Stearic acid 
C) Oleic acid 
D) Linoleic acid 
E) Arachidonic acid 
A) Palmitic acid 
B) Stearic acid 
C) Oleic acid 
D) Linoleic acid 
E) Arachidonic acid

Question 3

Draw the most stable chair conformation of dihydrocarvone.

Accepted Answer

The answer of Draw the most stable chair conformation of...

Question 4

Complete the reactions:
a)cholesterol + Ac2O
b)testosterone + LiAlH4
c)cholesterol + CH3COOOH
d)androsterone + CrO3

Accepted Answer

Question 5

Which of the following statements regarding triacylglycerols is not true?

Accepted Answer

A) They are synthesized in the body by adipocytes. 
B) They have an odd number of carbon atoms. 
C) They are solid if they do not have alkene groups. 
D) Those which can be hydrogenated undergo a significant change in melting point upon hydrogenation. 
E) They can be hydrolyzed to give glycerol and fatty acids. 
A) They are synthesized in the body by adipocytes. 
B) They have an odd number of carbon atoms. 
C) They are solid if they do not have alkene groups. 
D) Those which can be hydrogenated undergo a significant change in melting point upon hydrogenation. 
E) They can be hydrolyzed to give glycerol and fatty acids.

Question 6

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

Accepted Answer

A) CH3(CH2)12COOH 
B) CH3(CH2)14COOH 
C)    
D)    
E)    
A) CH3(CH2)12COOH 
B) CH3(CH2)14COOH 
C)    
D)    
E)

Question 7

Shown below is the formula for the antiinflammatory drug called prednisone.What is a correct systematic name for prednisone?

Accepted Answer

A) 17$\infty$,21-Dihydroxypregna-1,4-diene-3,11,20-trione 
B) 17$\beta$,21-Dihydroxypregna-1,4-diene-3,11,20-trione 
C) 17$\infty$,19-Dihydroxypregna-1,4-diene-3,11,20-trione 
D) 17$\beta$,19-Dihydroxypregna-1,4-diene-3,11,20-trione 
E) 17$\infty$,21-Dihydroandrostan-1,4-diene-3,11,20-trione 
A) 17$\infty$,21-Dihydroxypregna-1,4-diene-3,11,20-trione 
B) 17$\beta$,21-Dihydroxypregna-1,4-diene-3,11,20-trione 
C) 17$\infty$,19-Dihydroxypregna-1,4-diene-3,11,20-trione 
D) 17$\beta$,19-Dihydroxypregna-1,4-diene-3,11,20-trione 
E) 17$\infty$,21-Dihydroandrostan-1,4-diene-3,11,20-trione

Question 8

Which of these is a correct systematic name for progesterone?

Accepted Answer

A) 2-Estrene-4,20-dione 
B) 5-Androstene-4,19-dione 
C) 4-Pregnene-3,20-dione 
D) 5-Cholestene-5,19-dione 
E) 4-Cholene-3,20-dione 
A) 2-Estrene-4,20-dione 
B) 5-Androstene-4,19-dione 
C) 4-Pregnene-3,20-dione 
D) 5-Cholestene-5,19-dione 
E) 4-Cholene-3,20-dione

Question 9

How are soaps and phosphatides similar in their interaction with water?

Accepted Answer

Both have polar and non-polar groups,so

Question 10

The reaction of cholesterol with dilute aqueous KMnO4 at 0-5 °C produces which of these compounds (A and B rings only shown)?

Accepted Answer

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

Question 11

Which of the following statements regarding lipids is not true?

Accepted Answer

A) Lipids are soluble in non-polar organic solvents. 
B) All lipids have the same functional groups. 
C) Lipids include waxes,steroids,and triacylglycerols. 
D) Lipids have little in common except their solubility. 
E) Many lipids have biological roles. 
A) Lipids are soluble in non-polar organic solvents. 
B) All lipids have the same functional groups. 
C) Lipids include waxes,steroids,and triacylglycerols. 
D) Lipids have little in common except their solubility. 
E) Many lipids have biological roles.

Question 12

Sphingolipids,proteins,and polysaccharides make up ___,the protective coating around nerve fibers.

Accepted Answer

The answer of Sphingolipids,proteins,and polysaccharides make up ___,the protective coating...

Question 13

Which of the following could be used to prepare myristic acid,CH3(CH2)12COOH?

Accepted Answer

A) CH3(CH2)11CH2Br,CN-,heat; then H3O+,heat 
B) CH3(CH2)11CH2Br,Mg,(C2H5)2O; then CO2; then H3O+ 
C) CH3(CH2)13CHO,Ag2O,OH-; then H3O+  
D) Two of these choices. 
E) All of these choices. 
A) CH3(CH2)11CH2Br,CN-,heat; then H3O+,heat 
B) CH3(CH2)11CH2Br,Mg,(C2H5)2O; then CO2; then H3O+ 
C) CH3(CH2)13CHO,Ag2O,OH-; then H3O+  
D) Two of these choices. 
E) All of these choices.

Question 14

In naturally occurring polyunsaturated fatty acids,the relative position of double bonds is rarely ___.

Accepted Answer

The answer of In naturally occurring polyunsaturated fatty acids,the relative...

Question 15

There are three major classes of sex hormones:
a.female sex hormones [or ____________]
b.male sex hormones [or ____________]
c.pregnancy hormones [or ______________]

Accepted Answer

a.estrogen

Question 16

Unlike carbohydrates and proteins,which are defined in terms of their structures,lipids are defined in terms of ___.

Accepted Answer

the physic

Question 17

What of the following structures is a biodegradable soap or detergent?

Accepted Answer

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

Question 18

How do sphingolipids differ from phospholipids?

Accepted Answer

Sphingolipids are based on a l

Question 19

Which of these lipids yields glycerol upon hydrolysis?

Accepted Answer

A) A lecithin 
B) A phosphatidylserine 
C) A cephalin 
D) A triacylglycerol 
E) All of these choices. 
A) A lecithin 
B) A phosphatidylserine 
C) A cephalin 
D) A triacylglycerol 
E) All of these choices.

Question 20

Estrone can be separated from testosterone by

Accepted Answer

A) Treatment of the mixture with aqueous NaOH and extraction with ethyl ether.Estrone is extracted in the ether phase. 
B) Treatment of the mixture with NaOH and extraction with ethyl ether.Testosterone is extracted in the ether phase. 
C) Treatment of the mixture with NaOH and extraction with ethyl ether.Estrone and testosterone are extracted in the ether phase. 
D) Treatment of the mixture with NaHCO3 and extraction with ethyl ether.Testosterone is extracted in the ether phase. 
E) Treatment of the mixture with NaHCO3 and extraction with ethyl ether.Estrone is extracted in the ether phase. 
A) Treatment of the mixture with aqueous NaOH and extraction with ethyl ether.Estrone is extracted in the ether phase. 
B) Treatment of the mixture with NaOH and extraction with ethyl ether.Testosterone is extracted in the ether phase. 
C) Treatment of the mixture with NaOH and extraction with ethyl ether.Estrone and testosterone are extracted in the ether phase. 
D) Treatment of the mixture with NaHCO3 and extraction with ethyl ether.Testosterone is extracted in the ether phase. 
E) Treatment of the mixture with NaHCO3 and extraction with ethyl ether.Estrone is extracted in the ether phase.

Exam 23: Lipids

What is an undesired effect of the partial hydrogenation of oils?

The biosynthesis of one series of prostaglandins begins with which of these fatty acids?

Draw the most stable chair conformation of dihydrocarvone.

Complete the reactions: a)cholesterol + Ac2O b)testosterone + LiAlH4 c)cholesterol + CH3COOOH d)androsterone + CrO3

Which of the following statements regarding triacylglycerols is not true?

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

Shown below is the formula for the antiinflammatory drug called prednisone.What is a correct systematic name for prednisone?

Which of these is a correct systematic name for progesterone?

How are soaps and phosphatides similar in their interaction with water?

The reaction of cholesterol with dilute aqueous KMnO4 at 0-5 °C produces which of these compounds (A and B rings only shown)?

Which of the following statements regarding lipids is not true?

Sphingolipids,proteins,and polysaccharides make up ___,the protective coating around nerve fibers.

Which of the following could be used to prepare myristic acid,CH3(CH2)12COOH?

In naturally occurring polyunsaturated fatty acids,the relative position of double bonds is rarely ___.

There are three major classes of sex hormones: a.female sex hormones [or ____________] b.male sex hormones [or ____________] c.pregnancy hormones [or ______________]

Unlike carbohydrates and proteins,which are defined in terms of their structures,lipids are defined in terms of ___.

What of the following structures is a biodegradable soap or detergent?

How do sphingolipids differ from phospholipids?

Which of these lipids yields glycerol upon hydrolysis?

Estrone can be separated from testosterone by

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

Complete the reactions: a)cholesterol + Ac₂O b)testosterone + LiAlH₄ c)cholesterol + CH₃COOOH d)androsterone + CrO₃

The reaction of cholesterol with dilute aqueous KMnO₄ at 0-5 °C produces which of these compounds (A and B rings only shown)?

Which of the following could be used to prepare myristic acid,CH₃(CH₂)₁₂COOH?

There are three major classes of sex hormones: a.female sex hormones [or ] b.male sex hormones [or ] c.pregnancy hormones [or __]