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Eicosanoids are derived from what compound?


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

E) None of the above
F) All of the above

Correct Answer

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Which structure represents the lowest energy conformation of a trans-decalin? Which structure represents the lowest energy conformation of a trans-decalin? A) A B) B C) C D) D


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

E) B) and D)
F) A) and B)

Correct Answer

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


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

E) All of the above
F) B) and D)

Correct Answer

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Solid fats are generally from what source?


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

E) A) and D)
F) C) and D)

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What is (are) the basic subunits of terpenes?


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

E) A) and B)
F) A) and C)

Correct Answer

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


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.

E) B) and D)
F) C) and D)

Correct Answer

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


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

E) A) and B)
F) A) and C)

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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? Triacylglycerol A yields compound B when treated with excess H<sub>2</sub>, Pd-C.Ozonolysis of A affords three molecules of compound C and one molecule of compound D.What is the structure of A? A) A B) B C) C D) D


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

E) None of the above
F) B) and C)

Correct Answer

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Which of the following are simple lipids?


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

E) B) and C)
F) A) and D)

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Which of the following is a phospholipid? Which of the following is a phospholipid? A) A B) B C) C D) D


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

E) A) and B)
F) All of the above

Correct Answer

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


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

E) A) and B)
F) C) and D)

Correct Answer

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


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

E) B) and D)
F) All of the above

Correct Answer

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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? <sup> </sup>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? A) A B) B C) C D) D


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

E) A) and B)
F) B) and C)

Correct Answer

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


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

E) A) and B)
F) A) and C)

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How many isoprene units are contained in the following molecule? How many isoprene units are contained in the following molecule? A) 5 B) 4 C) 3 D) 2


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

E) A) and B)
F) All of the above

Correct Answer

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


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

E) B) and D)
F) A) and D)

Correct Answer

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


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

E) B) and C)
F) C) and D)

Correct Answer

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


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

E) B) and D)
F) A) and D)

Correct Answer

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


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

E) All of the above
F) A) and B)

Correct Answer

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