Question 1

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

Accepted Answer

the physic

Question 2

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 3

Which type of lipid gives these products on saponification: HOCH2CHOHCH2OH RCO2¯ R'CO2¯ PO43¯  HOCH2CH2NH2 ?

Accepted Answer

A)  Fat 
B)  Wax 
C)  Lecithin 
D)  Cephalin 
E)  Plasmalogen 
A)  Fat 
B)  Wax 
C)  Lecithin 
D)  Cephalin 
E)  Plasmalogen

Question 4

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 5

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 6

Which is the proper representation of three successive isoprene units in natural rubber?

Accepted Answer

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

Question 7

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 8

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)  None of the above 
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)  None of the above

Question 9

Draw the structure for the product of the reaction presented on the scheme.Name the process.

Accepted Answer

@#IMG-DLM& Hydrogena

Question 10

The primary function of triacylglycerols (triglycerides)in animals is _____________.

Accepted Answer

The answer of The primary function of triacylglycerols (triglycerides)in animals...

Question 11

Which of the following statements regarding triacylglycerols is true?

Accepted Answer

A)  They form micelles when mixed with water. 
B)  They are liquid if they are unsaturated. 
C)  They are solid if they have alkyne bonds. 
D)  They can be used to wash dirty dishes 
E)  They are soluble in water. 
A)  They form micelles when mixed with water. 
B)  They are liquid if they are unsaturated. 
C)  They are solid if they have alkyne bonds. 
D)  They can be used to wash dirty dishes 
E)  They are soluble in water.

Question 12

Which of these lipids does not yield glycerol upon hydrolysis?

Accepted Answer

A)  A lecithin 
B)  A sphingolipid 
C)  A cephalin 
D)  A triacylglycerol 
E)  A plasmalogen 
A)  A lecithin 
B)  A sphingolipid 
C)  A cephalin 
D)  A triacylglycerol 
E)  A plasmalogen

Question 13

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

Accepted Answer

Both have polar and non-polar groups,so

Question 14

Terpenes are built up from two or more five-carbon units known as __________.

Accepted Answer

The answer of Terpenes are built up from two or...

Question 15

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 the above 
A)  A lecithin 
B)  A phosphatidylserine 
C)  A cephalin 
D)  A triacylglycerol 
E)  All of the above

Question 16

Which of these lipids yields choline upon hydrolysis?

Accepted Answer

A)  A lecithin 
B)  A sphingomyelin 
C)  A cephalin 
D)  A cerebroside 
E)  Two of the above 
A)  A lecithin 
B)  A sphingomyelin 
C)  A cephalin 
D)  A cerebroside 
E)  Two of the above

Question 17

How could you convert an unsaturated fatty acid into a saturated fatty acid?

Accepted Answer

A)  KMnO4,OH-,heat 
B)  OH-,H2O,heat;then H3O+ 
C)  H2,Ni,pressure 
D)  H3O+,H2O,heat 
E)  O3;then Zn,HOAc 
A)  KMnO4,OH-,heat 
B)  OH-,H2O,heat;then H3O+ 
C)  H2,Ni,pressure 
D)  H3O+,H2O,heat 
E)  O3;then Zn,HOAc

Question 18

Choline cannot be found as a product of hydrolysis of any representative of this class of lipids.

Accepted Answer

A)  Cerebrosides 
B)  Phosphatidylserine 
C)  Plasmalogens 
D)  Waxes 
E)  None of the above yield choline upon hydrolysis 
A)  Cerebrosides 
B)  Phosphatidylserine 
C)  Plasmalogens 
D)  Waxes 
E)  None of the above yield choline upon hydrolysis

Question 19

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 bonds. 
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 bonds. 
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.

Exam 23: Lipids

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

Which of these is a wax?

Which type of lipid gives these products on saponification: HOCH2CHOHCH2OH RCO2¯ R'CO2¯ PO43¯ HOCH2CH2NH2 ?

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

Which of these is a correct systematic name for progesterone?

Which is the proper representation of three successive isoprene units in natural rubber?

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

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

Draw the structure for the product of the reaction presented on the scheme.Name the process.

The primary function of triacylglycerols (triglycerides)in animals is _____________.

Which of the following statements regarding triacylglycerols is true?

Which of these lipids does not yield glycerol upon hydrolysis?

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

Terpenes are built up from two or more five-carbon units known as __________.

Which of these lipids yields glycerol upon hydrolysis?

Which of these lipids yields choline upon hydrolysis?

How could you convert an unsaturated fatty acid into a saturated fatty acid?

Choline cannot be found as a product of hydrolysis of any representative of this class of lipids.

Which of the following statements regarding triacylglycerols is not true?

Carbon Compounds and Chemical Bonds

Representative Carbon Compounds: Functional Groups, Intermolecular Forces, and Infrared Ir Spectroscopy

An Introduction to Organic Reactions: Acids and Bases

Alkanes: Nomenclature, Conformational Analysis, and an Introduction to Synthesis

Stereochemistry: Chiral Molecules

Ionic Reactions - Nucleophilic Substitution and Elimination Reactions of Alkyl Halides

Alkenes and Alkynes I: Properties and Synthesis, Elimination Reactions of Alkyl Halides

Alkenes and Alkynes Ii: Addition Reactions

Nuclear Magnetic Resonance and Mass Spectrometry: Tools for Structure Determination

Radical Reactions

Alcohols and Ethers

Alcohols From Carbonyl Compounds Oxidation-Reduction and Organometallic Compounds

Conjugated Unsaturated Systems

Aromatic Compounds

Reactions of Aromatic Compounds

Aldehydes and Ketones I Nucleophilic Addition to the Carbonyl Group

Aldehydes and Ketones Ii Aldol Reactions

Carboxylic Acids and Their Derivatives Nucleophilic Addition - Elimination at the Acyl Carbon

Synthesis and Reactions of Beta-Dicarbonyl Compounds: More Chemistry of Enolate Ions

Amines

Phenols and Aryl Halides: Nucleophilic Aromatic Substitution

Carbohydrates

Amino Acids and Proteins

Nucleic Acids and Protein Synthesis

Filters

Which type of lipid gives these products on saponification: HOCH₂CHOHCH₂OH RCO₂¯ R'CO₂¯ PO₄³¯ HOCH₂CH₂NH₂ ?