Question 1

Lipids are substances that are in water and in nonpolar organic solvents. Enter the answers separated by a comma.

Accepted Answer

insoluble, soluble

Question 2

Male sex hormones like testosterone are called _____________.

Accepted Answer

androgens

Question 3

What are the roles of LDL and HDL? Which one is "good" cholesterol, which one is bad"?

Accepted Answer

Low density lipoprotein (LDL) is a protein that carries cholesterol from the site where it is synthesized to the rest of the body. High density lipoprotein (HDL) carries unused cholesterol to the liver where it is subject to degradation. Since build up of cholesterol in the arteries is a bad thing, LDL is "bad" cholesterol, and HDL is "good".

Question 4

Why do hydrogenated fats have higher boiling points than the triglycerides from which they are derived?

Accepted Answer

The saturated side chains of h

Question 5

What is the E/Z configuration of the carbon-carbon double bonds at C-5 and C-13 of prostaglandin F2α?

Accepted Answer

A)  5E,13E 
B)  5E,13Z 
C)  5Z,13E 
D)  5Z,13Z 
A)  5E,13E 
B)  5E,13Z 
C)  5Z,13E 
D)  5Z,13Z

Question 6

Arachidonic acid is a C20 acid that is involved in the biosynthesis of prostaglandins, an important class of biomolecules. Provide the IUPAC name of arachidinic acid.

Accepted Answer

(5Z,8Z,11Z

Question 7

Which of the following is not an eicosanoid?

Accepted Answer

A)  prostaglandin E2 
B)  leukotriene C4 
C)  thromboxane A2 
D)  cholesterol 
A)  prostaglandin E2 
B)  leukotriene C4 
C)  thromboxane A2 
D)  cholesterol

Question 8

What is the biological precursor of prostaglandins?

Accepted Answer

A)  stearic acid 
B)  arachadonic acid 
C)  oleic acid 
D)  linolenic acid 
A)  stearic acid 
B)  arachadonic acid 
C)  oleic acid 
D)  linolenic acid

Question 9

Ca+2, Mg+2, and/or Fe+3 are responsible for producing soap scum in water.

Accepted Answer

A) True 
 B)False

Question 10

The structure of acetyl-CoA is shown below and is a building block from which steroids are produced.

Accepted Answer

A) True 
 B)False

Question 11

The main difference between fats and oils is that oils contain a lower percentage of unsaturated alkyl chains.

Accepted Answer

A) True 
 B)False

Question 12

Salts of long chain fatty acids are called detergents.

Accepted Answer

A) True 
 B)False

Question 13

What is the structure of stearic acid?

Accepted Answer

A)  CH3(CH2)16COOH 
B)  CH3(CH2)7CH=CH(CH2)7COOH 
C)  CH3(CH2)18COOH 
D)  CH3CH2(CH=CHCH2)3(CH2)6COOH 
A)  CH3(CH2)16COOH 
B)  CH3(CH2)7CH=CH(CH2)7COOH 
C)  CH3(CH2)18COOH 
D)  CH3CH2(CH=CHCH2)3(CH2)6COOH

Question 14

Match the terms with the most appropriate descriptions.
-Self-assembly of phospholipids

Accepted Answer

A) Progesterone 
B) Testosterone 
C) Cholic acid 
D) Vitamin D 
E) Lipid bilayer 
A) Progesterone 
B) Testosterone 
C) Cholic acid 
D) Vitamin D 
E) Lipid bilayer

Question 15

The chiral centers in α-santonin are indicated by asterisks in the following.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following is not an intermediate in the biosynthesis of cholesterol?

Accepted Answer

A)  acetyl coenzyme A 
B)  isopentenyl pyrophosphate 
C)  squalene 
D)  arachidonic acid 
A)  acetyl coenzyme A 
B)  isopentenyl pyrophosphate 
C)  squalene 
D)  arachidonic acid

Question 17

_____ is a plasma-soluble complex formed when protein complexes with cholesterol.

Accepted Answer

A)  Bile acid 
B)  Lipoprotein 
C)  Anabolic steroid 
D)  Blood plasma 
A)  Bile acid 
B)  Lipoprotein 
C)  Anabolic steroid 
D)  Blood plasma

Question 18

Which of the following is not found in a fluid mosaic lipid bilayer?

Accepted Answer

A)  phospholipid 
B)  cholesterol 
C)  protein 
D)  nucleic acid 
A)  phospholipid 
B)  cholesterol 
C)  protein 
D)  nucleic acid

Question 19

Describe how the structure of a phospholipid differs from that of a trigyceride fat, and what influence this difference has on the interaction of these molecules with water.

Accepted Answer

A triglyceride fat has three long-chain

Question 20

Which of the following is not true?

Accepted Answer

A)  sodium soaps are prepared by saponification of triglycerides 
B)  a by-product of the saponification of triglycerides is glycerol 
C)  soap molecules assemble into micelles 
D)  grease molecules absorb on to the surface of micelles 
A)  sodium soaps are prepared by saponification of triglycerides 
B)  a by-product of the saponification of triglycerides is glycerol 
C)  soap molecules assemble into micelles 
D)  grease molecules absorb on to the surface of micelles

Exam 26: Lipids

Lipids are substances that are in water and in nonpolar organic solvents. Enter the answers separated by a comma.

Male sex hormones like testosterone are called _____________.

What are the roles of LDL and HDL? Which one is "good" cholesterol, which one is bad"?

Why do hydrogenated fats have higher boiling points than the triglycerides from which they are derived?

What is the E/Z configuration of the carbon-carbon double bonds at C-5 and C-13 of prostaglandin F2α?

Arachidonic acid is a C20 acid that is involved in the biosynthesis of prostaglandins, an important class of biomolecules. Provide the IUPAC name of arachidinic acid.

Which of the following is not an eicosanoid?

What is the biological precursor of prostaglandins?

Ca+2, Mg+2, and/or Fe+3 are responsible for producing soap scum in water.

The structure of acetyl-CoA is shown below and is a building block from which steroids are produced.

The main difference between fats and oils is that oils contain a lower percentage of unsaturated alkyl chains.

Salts of long chain fatty acids are called detergents.

What is the structure of stearic acid?

Match the terms with the most appropriate descriptions. -Self-assembly of phospholipids

The chiral centers in α-santonin are indicated by asterisks in the following.

Which of the following is not an intermediate in the biosynthesis of cholesterol?

_____ is a plasma-soluble complex formed when protein complexes with cholesterol.

Which of the following is not found in a fluid mosaic lipid bilayer?

Describe how the structure of a phospholipid differs from that of a trigyceride fat, and what influence this difference has on the interaction of these molecules with water.

Which of the following is not true?

Covalent Bonding and Shapes of Molecules

Alkanes and Cycloalkanes

Stereoisomerism and Chirality

Acids and Bases

Alkenes: Bonding, Nomenclature, and Properties

Reactions of Alkenes

Alkynes

Haloalkanes, Halogenation, and Radical Reactions

Nucleophilic Substitution and Beta-Elimination

Alcohols

Ethers, Epoxides, and Sulfides

Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Mass Spectrometry

An Introduction to Organometallic Compounds

Aldehydes and Ketones

Carboxylic Acids

Functional Derivatives of Carboxylic Acids

Enolate Anions and Enamines

Dienes, Conjugated Systems, and Pericyclic Reactions

Benzene and the Concept of Aromaticity

Reactions of Benzene and Its Derivatives

Amines

Catalytic Carbon-Carbon Bond Formation

Carbohydrates

Amino Acids and Proteins

Nucleic Acids

Organic Polymer Chemistry

Filters

What is the E/Z configuration of the carbon-carbon double bonds at C-5 and C-13 of prostaglandin F₂_α?

Arachidonic acid is a C₂₀ acid that is involved in the biosynthesis of prostaglandins, an important class of biomolecules. Provide the IUPAC name of arachidinic acid.

Ca⁺², Mg⁺², and/or Fe⁺³ are responsible for producing soap scum in water.