Question 1

What is the name of the reaction of triglycerides with a base?

Accepted Answer

A) Esterification 
B) Transesterification 
C) Ozonolysis 
D) Saponification 
A) Esterification 
B) Transesterification 
C) Ozonolysis 
D) Saponification D

Question 2

What is (are)the basic subunits of terpenes?

Accepted Answer

A) Cyclohexane 
B) Triacylglycerols 
C) Isoprene 
D) Carbonyls 
A) Cyclohexane 
B) Triacylglycerols 
C) Isoprene 
D) Carbonyls C

Question 3

Which of the following classes of molecules is not a nonhydrolyzable lipid?

Accepted Answer

A) Steroids 
B) Terpenes 
C) Phospholipids 
D) Eicosanoids 
A) Steroids 
B) Terpenes 
C) Phospholipids 
D) Eicosanoids C

Question 4

What is the result of the oxidation of arachidonic acid with O2 by cyclooxygenase?

Accepted Answer

A) It results in the synthesis of prostaglandins,thromboxanes,and prostacyclins. 
B) It results in the synthesis of fat-soluble vitamins from sphingomyelins. 
C) It results in the synthesis of phosphoacylglycerols. 
D) It is an important step in the synthesis of lipids that form the lipid bilayer. 
A) It results in the synthesis of prostaglandins,thromboxanes,and prostacyclins. 
B) It results in the synthesis of fat-soluble vitamins from sphingomyelins. 
C) It results in the synthesis of phosphoacylglycerols. 
D) It is an important step in the synthesis of lipids that form the lipid bilayer.

Question 5

What happens to the melting point in fatty acids as the unsaturation increases?

Accepted Answer

A) It increases 
B) It decreases. 
C) There is no direct correlation between unsaturation and melting point. 
D) The melting point stays the same. 
A) It increases 
B) It decreases. 
C) There is no direct correlation between unsaturation and melting point. 
D) The melting point stays the same.

Question 6

Which of the following fatty acids has the lowest melting point?

Accepted Answer

A) Palmitic acid 
B) Arachidic acid 
C) Stearic acid 
D) Lauric acid 
A) Palmitic acid 
B) Arachidic acid 
C) Stearic acid 
D) Lauric acid

Question 7

Which of the following fatty acids is not present in natural fats and oils?

Accepted Answer

A) Hexadecanoic acid 
B) Heptadecanoic acid 
C) Octadecanoic acid 
D) None of the choices 
A) Hexadecanoic acid 
B) Heptadecanoic acid 
C) Octadecanoic acid 
D) None of the choices

Question 8

All except one of the statements below are true about the molecule given.Which statement is not correct?

Accepted Answer

A) This molecule is a phospholipid and is generally found in fruits,vegetables,fish,liver,and dairy products. 
B) This molecule is a phospholipid that composes the main fabric of the insoluble barrier that protects the cell. 
C) This molecule contains two fatty acids and has at least one stereogenic center. 
D) This molecule is a phospholipid and belongs to the general category of lecithins. 
A) This molecule is a phospholipid and is generally found in fruits,vegetables,fish,liver,and dairy products. 
B) This molecule is a phospholipid that composes the main fabric of the insoluble barrier that protects the cell. 
C) This molecule contains two fatty acids and has at least one stereogenic center. 
D) This molecule is a phospholipid and belongs to the general category of lecithins.

Question 9

Norethindrone is a synthetic steroid that is better than progesterone in suppressing ovulation.What reagents (1-3)are required to convert norethindrone to the derivatives shown below?

Accepted Answer

A) (1)H2,Pd-C; (2)(CH3)2CHCH2NH2,NaBH3CN; (3)a.O3,b.Zn,DMS 
B) (1)H2,Pd-C; (2)(CH3)2CHCH2NH2,mild acid; (3)a.O3,b.Zn,DMS 
C) (1)a.LiAlH4,b.H2O; (2)(CH3)2CHCH2NH2,NaBH3CN; (3)a.OsO4,b.NaHSO3 
D) (1)a.LiAlH4,b.H2O; (2)(CH3)2CHCH2NH2,mild acid; (3)a.OsO4,b.NaHSO3 
A) (1)H2,Pd-C; (2)(CH3)2CHCH2NH2,NaBH3CN; (3)a.O3,b.Zn,DMS 
B) (1)H2,Pd-C; (2)(CH3)2CHCH2NH2,mild acid; (3)a.O3,b.Zn,DMS 
C) (1)a.LiAlH4,b.H2O; (2)(CH3)2CHCH2NH2,NaBH3CN; (3)a.OsO4,b.NaHSO3 
D) (1)a.LiAlH4,b.H2O; (2)(CH3)2CHCH2NH2,mild acid; (3)a.OsO4,b.NaHSO3

Question 10

Which of the following compounds is not a hydrolyzable lipid?

Accepted Answer

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

Question 11

Evaluate the following statement: The terpene structure shown is a hydrolysable lipid.

Accepted Answer

A) True,because it contains an alcohol functional group. 
B) False,because alcohol and aldehyde moieties are not hydrolysable. 
C) True,because there are three polar groups and only 12 total carbon atoms. 
D) False,because there is too much steric repulsion from the alcohol and aldehyde moieties. 
A) True,because it contains an alcohol functional group. 
B) False,because alcohol and aldehyde moieties are not hydrolysable. 
C) True,because there are three polar groups and only 12 total carbon atoms. 
D) False,because there is too much steric repulsion from the alcohol and aldehyde moieties.

Question 12

Which of the following fatty acids has the highest melting point?

Accepted Answer

A) Linoleic acid 
B) Oleic acid 
C) Arachidonic acid 
D) Palmitoleic acid 
A) Linoleic acid 
B) Oleic acid 
C) Arachidonic acid 
D) Palmitoleic acid

Question 13

What is the correct classification of the following compound? CH3(CH2)15COOH

Accepted Answer

A) Saturated triglyceride 
B) Simple lipid 
C) Wax 
D) Saturated fatty acid 
A) Saturated triglyceride 
B) Simple lipid 
C) Wax 
D) Saturated fatty acid

Question 14

Which of the following is a fat soluble vitamin?

Accepted Answer

A) Vitamin A 
B) Vitamin D3 
C) Vitamin K 
D) All of these choices are correct 
A) Vitamin A 
B) Vitamin D3 
C) Vitamin K 
D) All of these choices are correct

Question 15

What is (are)the biological precursor(s)for the formation of the steroid skeleton found in cholesterol?

Accepted Answer

A) Cyclohexane 
B) Squalene 
C) Triacylglycerols 
D) Arachadonic acid 
A) Cyclohexane 
B) Squalene 
C) Triacylglycerols 
D) Arachadonic acid

Question 16

What is the first key enzyme required for the synthesis of prostaglandins from arachidonic acid?

Accepted Answer

A) Protein Kinase C 
B) Synthase 
C) Transferase 
D) COX (cyclic oxygenase) 
A) Protein Kinase C 
B) Synthase 
C) Transferase 
D) COX (cyclic oxygenase)

Question 17

Which of the following sequences shows a reasonable series of 1,2-rearrangements as might be found in the biosynthesis of a steroid?

Accepted Answer

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

Question 18

Which of the following is a phospholipid?

Accepted Answer

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

Question 19

Which of the following are simple lipids?

Accepted Answer

A) Steroids 
B) Terpenes 
C) Waxes 
D) Prostaglandins 
A) Steroids 
B) Terpenes 
C) Waxes 
D) Prostaglandins

Question 20

What is the main cellular function of a triacylglycerol?

Accepted Answer

A) Signal transduction 
B) Form cell membranes 
C) Nerve cell transferal 
D) Energy storage 
A) Signal transduction 
B) Form cell membranes 
C) Nerve cell transferal 
D) Energy storage

Exam 29: Lipids

What is the name of the reaction of triglycerides with a base?

What is (are)the basic subunits of terpenes?

Which of the following classes of molecules is not a nonhydrolyzable lipid?

What is the result of the oxidation of arachidonic acid with O2 by cyclooxygenase?

What happens to the melting point in fatty acids as the unsaturation increases?

Which of the following fatty acids has the lowest melting point?

Which of the following fatty acids is not present in natural fats and oils?

All except one of the statements below are true about the molecule given.Which statement is not correct?

Norethindrone is a synthetic steroid that is better than progesterone in suppressing ovulation.What reagents (1-3)are required to convert norethindrone to the derivatives shown below?

Which of the following compounds is not a hydrolyzable lipid?

Evaluate the following statement: The terpene structure shown is a hydrolysable lipid.

Which of the following fatty acids has the highest melting point?

What is the correct classification of the following compound? CH3(CH2)15COOH

Which of the following is a fat soluble vitamin?

What is (are)the biological precursor(s)for the formation of the steroid skeleton found in cholesterol?

What is the first key enzyme required for the synthesis of prostaglandins from arachidonic acid?

Which of the following sequences shows a reasonable series of 1,2-rearrangements as might be found in the biosynthesis of a steroid?

Which of the following is a phospholipid?

Which of the following are simple lipids?

What is the main cellular function of a triacylglycerol?

Structure and Bonding

Acids and Bases

Introduction to Organic Molecules and Functional Groups

Alkanes

Stereochemistry

Understanding Organic Reactions

Alkyl Halides and Nucleophilic Substitution

Alkyl Halides and Elimination Reactions

Alcohols,ethers,and Related Compounds

Alkenes and Addition Reactions

Alkynes and Synthesis

Oxidation and Reduction

Radical Reactions

Conjugation, resonance, and Dienes

Benzene and Aromatic Compounds

Reactions of Aromatic Compounds

Introduction to Carbonyl Chemistry; Organometallic Reagents; Oxidation and Reduction

Aldehydes and Ketones - Nucleophilic Addition

Carboxylic Acids and the Acidity of the O-H Bond

Carboxylic Acids and Their Derivatives - Nucleophilic Acyl Substitution

Substitution Reactions of Carbonyl Compounds at the a Carbon

Carbonyl Condensation Reactions

Amines

Carbon-Carbon Bond-Forming Reactions in Organic Synthesis

Pericyclic Reactions

Carbohydrates

Amino Acids and Proteins

Synthetic Polymers

Molecular Ion Peaks and Fragmentation Patterns

Analyzing Molecular Motion and Infrared Spectroscopy

Organic Spectroscopy Concepts

Filters

What is the result of the oxidation of arachidonic acid with O₂ by cyclooxygenase?

What is the correct classification of the following compound? CH₃(CH₂)₁₅COOH