Question 1

Most waxes,commonly found as protective coatings on skin,fur,hair,leaves,fruits,etc.,are ___.

Accepted Answer

esters of long chain

Question 2

Which type of lipid gives the following products on saponification? HOCH2CHOHCH2OH RCO2¯ R'CO2¯ PO43¯  [HOCH2CH2N(CH3)3]+OH-

Accepted Answer

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

Question 3

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 4

Explain why it is not possible to measure a melting point for oils.

Accepted Answer

Oils are not homogeneous compounds,but m

Question 5

Which of the following is a phosphatidic acid?

Accepted Answer

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

Question 6

Which type of lipid gives these products on saponification? HOCH2CHOHCH2OH RCO2¯ RCH2CHO 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 7

Draw the structures of the following compounds and show the positions of the isoprene units:
a)farnesol
b)retinal
c)squalene
d)β-carotene

Accepted Answer

The answer of Draw the structures of the following compounds...

Question 8

A compound "Z" (C10H16),has $\lambda$max at 184 nm in its UV spectrum.Catalytic hydrogenation of Z affords a mixture of diastereomers,which upon separation are identified to be cis-1-isopropyl-4-methylcyclohexane and trans-1-isopropyl-4-methylcyclohexane.Upon ozonolysis,Z yields formaldehyde and 3-acetyl-6-oxoheptanal.Suggest a structure for Z that is consistent with all of the above data,clearly explaining your rationale.

Accepted Answer

@#IMG-DLM& - IHD for Z: (C₁₀H_{22 </}

Question 9

Which of these reagents would not react with oleic acid?

Accepted Answer

A) H2,Ni 
B) DIBAL-H (diisobutylaluminium hydride) 
C) O3/CH2Cl2 
D) NH3/H2O 
E) LAH (lithium aluminium hydride) 
A) H2,Ni 
B) DIBAL-H (diisobutylaluminium hydride) 
C) O3/CH2Cl2 
D) NH3/H2O 
E) LAH (lithium aluminium hydride)

Question 10

What of the following statements are true:

Accepted Answer

A) Fatty acids are linear and contain an even number of carbons. 
B) Triacylglycerols contain ether functionalities. 
C) Triacylglycerols are formed by long chain alcohols and glycerol. 
D) Triacylglycerols containing unsaturated fatty acids have high melting temperature. 
E) Two of these statements are true. 
A) Fatty acids are linear and contain an even number of carbons. 
B) Triacylglycerols contain ether functionalities. 
C) Triacylglycerols are formed by long chain alcohols and glycerol. 
D) Triacylglycerols containing unsaturated fatty acids have high melting temperature. 
E) Two of these statements are true.

Question 11

Draw the structure of the products you would expect to obtain from reaction of glyceryl trioleate with the following:
a)excess Br2 in CCl4 
b)H2/Pd
c)NaOH/H2O
d)O3,then Zn/CH3COOH
e)LiAlH4,then H3O+

Accepted Answer

Question 12

Which of the following is a female sex hormone?

Accepted Answer

A) Ergosterol 
B) Estradiol 
C) Cortisone 
D) Androsterone 
E) Cholic acid 
A) Ergosterol 
B) Estradiol 
C) Cortisone 
D) Androsterone 
E) Cholic acid

Question 13

To which class of terpenes does the terpene shown below,bisabolene,belong?

Accepted Answer

A) Monoterpenes 
B) Sesquiterpenes 
C) Diterpenes 
D) Triterpenes 
E) Tetraterpenes 
A) Monoterpenes 
B) Sesquiterpenes 
C) Diterpenes 
D) Triterpenes 
E) Tetraterpenes

Question 14

The ozonolysis of a fatty acid produces these fragments:   What is the identity of the fatty acid?

Accepted Answer

A) Stearic acid 
B) Palmitoleic acid 
C) Oleic acid 
D) Linoleic acid 
E) Linolenic acid 
A) Stearic acid 
B) Palmitoleic acid 
C) Oleic acid 
D) Linoleic acid 
E) Linolenic acid

Question 15

Which of the following would not be helpful in distinguishing between oleic acid,linoleic acid and linolenic acid?

Accepted Answer

A) Examine the stoichiometry of the reaction with Br2,CCl4 
B) Examine the stoichiometry of complete catalytic hydrogenation. 
C) Examine the products obtained after subjecting the sample to catalytic hydrogenation 
D) Examine products obtained after subjecting the sample to: i)O3,CH2Cl2; ii)Zn,CH3CO2H 
E) Examine the molecular weight of the acids. 
A) Examine the stoichiometry of the reaction with Br2,CCl4 
B) Examine the stoichiometry of complete catalytic hydrogenation. 
C) Examine the products obtained after subjecting the sample to catalytic hydrogenation 
D) Examine products obtained after subjecting the sample to: i)O3,CH2Cl2; ii)Zn,CH3CO2H 
E) Examine the molecular weight of the acids.

Question 16

Of the saturated fatty acids found in fats and oils,this one normally is the most abundant:

Accepted Answer

A) Capric acid 
B) Lauric acid 
C) Myristic acid 
D) Palmitic acid 
E) Stearic acid 
A) Capric acid 
B) Lauric acid 
C) Myristic acid 
D) Palmitic acid 
E) Stearic acid

Question 17

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

Accepted Answer

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

Question 18

Diethylstilbestrol (DES)exhibits estradiol-like activity even though it is structurally unrelated to steroids.Once used widely as an additive in animal feed,DES has been implicated as a causative agent in several types of cancer.Show how DES can be drawn so that it is sterically similar to estradiol.

Accepted Answer

The answer of Diethylstilbestrol (DES)exhibits estradiol-like activity even though it...

Question 19

Draw the structures of three soaps or detergents,in which the alkyl portion is CH3(CH2)12- and the functional group is:
sodium carboxylate,
sodium alkanesulfonate and
sodium alkyl sulfate
Explain why these substances may be useful as "dirt removers."

Accepted Answer

@#IMG-DLM& 
Each of these substances has a polar "

Question 20

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

Accepted Answer

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

Exam 23: Lipids

Most waxes,commonly found as protective coatings on skin,fur,hair,leaves,fruits,etc.,are ___.

Which type of lipid gives the following products on saponification? HOCH2CHOHCH2OH RCO2¯ R'CO2¯ PO43¯ [HOCH2CH2N(CH3)3]+OH-

Which of these lipids does not yield glycerol upon hydrolysis?

Explain why it is not possible to measure a melting point for oils.

Which of the following is a phosphatidic acid?

Which type of lipid gives these products on saponification? HOCH2CHOHCH2OH RCO2¯ RCH2CHO PO43¯ HOCH2CH2NH2

Draw the structures of the following compounds and show the positions of the isoprene units: a)farnesol b)retinal c)squalene d)β-carotene

Which of these reagents would not react with oleic acid?

What of the following statements are true:

Draw the structure of the products you would expect to obtain from reaction of glyceryl trioleate with the following: a)excess Br2 in CCl4 b)H2/Pd c)NaOH/H2O d)O3,then Zn/CH3COOH e)LiAlH4,then H3O+

Which of the following is a female sex hormone?

To which class of terpenes does the terpene shown below,bisabolene,belong?

The ozonolysis of a fatty acid produces these fragments: What is the identity of the fatty acid?

Which of the following would not be helpful in distinguishing between oleic acid,linoleic acid and linolenic acid?

Of the saturated fatty acids found in fats and oils,this one normally is the most abundant:

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

Draw the structures of three soaps or detergents,in which the alkyl portion is CH3(CH2)12- and the functional group is: sodium carboxylate, sodium alkanesulfonate and sodium alkyl sulfate Explain why these substances may be useful as "dirt removers."

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

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 type of lipid gives the following products on saponification? HOCH₂CHOHCH₂OH RCO₂¯ R'CO₂¯ PO₄³¯ [HOCH₂CH₂N(CH₃)₃]⁺OH^-

Which type of lipid gives these products on saponification? HOCH₂CHOHCH₂OH RCO₂¯ RCH₂CHO PO₄³¯ HOCH₂CH₂NH₂

Draw the structure of the products you would expect to obtain from reaction of glyceryl trioleate with the following: a)excess Br₂ in CCl₄ b)H₂/Pd c)NaOH/H₂O d)O₃,then Zn/CH₃COOH e)LiAlH₄,then H₃O⁺

Draw the structures of three soaps or detergents,in which the alkyl portion is CH₃(CH₂)₁₂- and the functional group is: sodium carboxylate, sodium alkanesulfonate and sodium alkyl sulfate Explain why these substances may be useful as "dirt removers."