Question 1

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 D

Question 2

Which of the following correctly describes waxes?

Accepted Answer

A) Long chain alcohols 
B) Long chain esters 
C) Long chain ethers 
D) Long chain fatty acids 
A) Long chain alcohols 
B) Long chain esters 
C) Long chain ethers 
D) Long chain fatty acids B

Question 3

Provide a definition of the term lipid.

Accepted Answer

A) A compound with a carbonyl group 
B) A compound with an aromatic ring 
C) A hydrophobic biomolecule 
D) A water-soluble compound 
A) A compound with a carbonyl group 
B) A compound with an aromatic ring 
C) A hydrophobic biomolecule 
D) A water-soluble compound C

Question 4

From the statements below, pick out the one that is not correct for fat-soluble vitamins.

Accepted Answer

A) Fat-soluble vitamins are classified as lipids. 
B) Fat-soluble vitamins are a group of biologically active compounds containing 20 carbon atoms. 
C) Fat-soluble vitamins are required in small quantities for normal metabolism. 
D) Fat-soluble vitamins are stored in fat cells for use when they are needed. 
A) Fat-soluble vitamins are classified as lipids. 
B) Fat-soluble vitamins are a group of biologically active compounds containing 20 carbon atoms. 
C) Fat-soluble vitamins are required in small quantities for normal metabolism. 
D) Fat-soluble vitamins are stored in fat cells for use when they are needed.

Question 5

Which of the following fatty acids has the lowest 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 6

How many isoprene units can be found in the following compound?

Accepted Answer

A) 1 
B) 4 
C) 8 
D) 9 
A) 1 
B) 4 
C) 8 
D) 9

Question 7

The stereoselective introduction of the C15 OH group on the w side chain of prostaglandins has presented a challenge for synthetic chemists.Recently, Mulzer and co-workers demonstrated a new route in which the wside chain is synthesized independently and then attached to the bicyclic counterpart.What is the appropriate sequence of reagents for the following synthesis?

Accepted Answer

A) (1) PBr3; (2) Grubbs' catalyst, Reagent X; (3) KOC(CH3)3 
B) (1) PCC; (2) Ph3P=CH2; (3) Grubbs' catalyst, Reagent X 
C) (1) PBr3; (2) Ph3P=CH2; (3) Grubbs' catalyst, Reagent X 
D) (1) TsCl, pyridine; (2) Grubbs' catalyst, Reagent X; (3) KOC(CH3)3 
A) (1) PBr3; (2) Grubbs' catalyst, Reagent X; (3) KOC(CH3)3 
B) (1) PCC; (2) Ph3P=CH2; (3) Grubbs' catalyst, Reagent X 
C) (1) PBr3; (2) Ph3P=CH2; (3) Grubbs' catalyst, Reagent X 
D) (1) TsCl, pyridine; (2) Grubbs' catalyst, Reagent X; (3) KOC(CH3)3

Question 8

Liquid oils usually have a higher percentage of what component compared to solid fats?

Accepted Answer

A) Oxygen 
B) Hydrogen 
C) Unsaturation 
D) Aromatic rings 
A) Oxygen 
B) Hydrogen 
C) Unsaturation 
D) Aromatic rings

Question 9

Which of the following fatty acids has the highest 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 10

How many isoprene units are in the following molecule?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
A) 1 
B) 2 
C) 3 
D) 4

Question 11

Which of the following are complex lipids?

Accepted Answer

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

Question 12

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 13

Which of the following compounds is not a lipid?

Accepted Answer

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

Question 14

What is the purpose of vitamin K?

Accepted Answer

A) Energy storage 
B) Blood clotting 
C) Photosynthesis 
D) Hydrogenation 
A) Energy storage 
B) Blood clotting 
C) Photosynthesis 
D) Hydrogenation

Question 15

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

Question 16

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

Question 18

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 19

What is the structure of a cortisone derivative that has a C=C between C6 and C7, methyl group at C8 and chlorine at C12? The configuration of C8 is S and the configuration at C12 is R.

Accepted Answer

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

Question 20

Which of the following compounds is a steroid?

Accepted Answer

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

Exam 31: Lipids

What is the main cellular function of a triacylglycerol?

Which of the following correctly describes waxes?

Provide a definition of the term lipid.

From the statements below, pick out the one that is not correct for fat-soluble vitamins.

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

How many isoprene units can be found in the following compound?

Liquid oils usually have a higher percentage of what component compared to solid fats?

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

How many isoprene units are in the following molecule?

Which of the following are complex lipids?

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 compounds is not a lipid?

What is the purpose of vitamin K?

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

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

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

Which of the following compounds is not a hydrolyzable lipid?

What is the structure of a cortisone derivative that has a C=C between C6 and C7, methyl group at C8 and chlorine at C12? The configuration of C8 is S and the configuration at C12 is R.

Which of the following compounds is a steroid?

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

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