Question 1

What is (are) the basic subunits of terpenes?

Accepted Answer

A)  Cyclohexane
B)  Triacylglycerols
C)  Isoprene
D)  CarbonylsE) None of the above
F) A) and C) C

Question 2

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

Question 3

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 acidE) B) and D)
F) B) and 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.E) A) and B)
F) B) and D)

Question 5

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

Accepted Answer

A)  Steroids
B)  Terpenes
C)  Phospholipids
D)  EicosanoidsE) B) and C)
F) None of the above C

Question 6

Which of the following compounds is not a hydrolyzable lipid?

Accepted Answer

A)  A
B)  B
C)  C
D)  DE) A) and B)
F) All of the above

Question 7

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

Question 8

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

Accepted Answer

A)  Esterification
B)  Transesterification
C)  Ozonolysis
D)  SaponificationE) A) and D)
F) A) and C) D

Question 9

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

Question 10

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

Question 11

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

Question 12

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 correctE) A) and C)
F) A) and B)

Question 13

What is the main cellular function of a triacylglycerol?

Accepted Answer

A)  Signal transduction
B)  Form cell membranes
C)  Nerve cell transferal
D)  Energy storageE) B) and C)
F) None of the above

Question 14

Which of the following are simple lipids?

Accepted Answer

A)  Steroids
B)  Terpenes
C)  Waxes
D)  ProstaglandinsE) None of the above
F) A) and B)

Question 15

Which of the following is a phospholipid?

Accepted Answer

A)  A
B)  B
C)  C
D)  DE) None of the above
F) A) and B)

Question 16

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? 2,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" class="answers-bank-image d-inline" rel="preload" >

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.NaHSO3E) All of the above
F) A) and B)

Question 17

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 acidE) C) and D)
F) A) and B)

Question 18

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

Accepted Answer

A)  Linoleic acid
B)  Oleic acid
C)  Arachidonic acid
D)  Palmitoleic acidE) A) and B)
F) C) and D)

Question 19

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)  DE) C) and D)
F) None of the above

Question 20

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

Accepted Answer

A)  Palmitic acid
B)  Arachidic acid
C)  Stearic acid
D)  Lauric acidE) C) and D)
F) A) and D)

Exam 29: Lipids

What is (are) the basic subunits of terpenes?

Correct AnswerverifiedC

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedC

Which of the following compounds is not a hydrolyzable lipid?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedD

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is a fat soluble vitamin?

Correct AnswerverifiedShow Answer

What is the main cellular function of a triacylglycerol?

Correct AnswerverifiedShow Answer

Which of the following are simple lipids?

Correct AnswerverifiedShow Answer

Which of the following is a phospholipid?

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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C

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

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

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C

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D

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