Question 1

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 2

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 3

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 4

How can an unsaturated fatty acid be converted into a saturated fatty acid?

Accepted Answer

A) Hydrogenation 
B) Hydration 
C) Ozonolysis 
D) Hydrolysis 
A) Hydrogenation 
B) Hydration 
C) Ozonolysis 
D) Hydrolysis

Question 5

Solid fats are generally from what source?

Accepted Answer

A) Vegetables 
B) Starches 
C) Legumes 
D) Animals 
A) Vegetables 
B) Starches 
C) Legumes 
D) Animals

Question 6

Triacylglycerol A yields compound B when treated with excess H2, Pd-C.Ozonolysis of A affords three molecules of compound C and one molecule of compound D.What is the structure of A?

Accepted Answer

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

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

Which of the following is not one of the three main categories of hydrolyzable lipids?

Accepted Answer

A) Waxes 
B) Steroids 
C) Triacylglycerols 
D) Phospholipids 
A) Waxes 
B) Steroids 
C) Triacylglycerols 
D) Phospholipids

Question 9

Eicosanoids are derived from what compound?

Accepted Answer

A) Arachidonic acid 
B) Cyclohexane 
C) Cholesterol 
D) Triacylglycerols 
A) Arachidonic acid 
B) Cyclohexane 
C) Cholesterol 
D) Triacylglycerols

Question 10

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 11

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 12

Sphingomyelins are a major component of the myelin sheath.Damage to the myelin sheath results in such diseases as multiple sclerosis.Which compound below corresponds to a sphingomyelin?

Accepted Answer

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

Question 13

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

Question 14

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 15

Which structure represents the lowest energy conformation of a trans-decalin?

Accepted Answer

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

Question 16

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

Question 17

How many isoprene units are contained in the following molecule?

Accepted Answer

A) 5 
B) 4 
C) 3 
D) 2 
A) 5 
B) 4 
C) 3 
D) 2

Question 18

What chemical process causes an oil (such as soybean oil) to become rancid?

Accepted Answer

A) Hydrogenation with hydrogen 
B) Hydration with water 
C) Oxidation with molecular oxygen 
D) Bromination with bromine 
A) Hydrogenation with hydrogen 
B) Hydration with water 
C) Oxidation with molecular oxygen 
D) Bromination with bromine

Question 19

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

Exam 31: Lipids

Which of the following are simple lipids?

Which of the following is a phospholipid?

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

How can an unsaturated fatty acid be converted into a saturated fatty acid?

Solid fats are generally from what source?

Triacylglycerol A yields compound B when treated with excess H2, Pd-C.Ozonolysis of A affords three molecules of compound C and one molecule of compound D.What is the structure of A?

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

Which of the following is not one of the three main categories of hydrolyzable lipids?

Eicosanoids are derived from what compound?

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?

Sphingomyelins are a major component of the myelin sheath.Damage to the myelin sheath results in such diseases as multiple sclerosis.Which compound below corresponds to a sphingomyelin?

What is (are) the basic subunits of terpenes?

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

Which structure represents the lowest energy conformation of a trans-decalin?

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

How many isoprene units are contained in the following molecule?

What chemical process causes an oil (such as soybean oil) to become rancid?

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

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

Alkynes

Oxidation and Reduction

Mass Spectrometry and Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Radical Reactions

Conjugation, Resonance, and Dienes

Benzene and Aromatic Compounds

Reactions of Aromatic Compounds

Carboxylic Acids and the Acidity of the O-H Bond

Introduction to Carbonyl Chemistry;

Aldehydes and Ketones Nucleophilic Addition

Carboxylic Acids and Derivatives

Substitution Reactions of Carbonyl Compounds at the Alpha-Carbon

Carbonyl Condensation Reactions

Amines

Carbon-Carbon Bond Forming Reactions in Organic Synthesis

Pericyclic Reactions

Carbohydrates

Amino Acids and Proteins

Synthetic Polymers

Filters

Triacylglycerol A yields compound B when treated with excess H₂, Pd-C.Ozonolysis of A affords three molecules of compound C and one molecule of compound D.What is the structure of A?

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