Question 1

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

Question 2

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) 6COOHE) A) and B)
F) A) and C)

Question 3

Salts of long chain fatty acids are called detergents.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following is not an eicosanoid?

Accepted Answer

A)   prostaglandin E2
B)   leukotriene C4
C)   thromboxane A2
D)   cholesterolE) A) and B)
F) A) and C)

Question 5

Male sex hormones like testosterone are called _____________.

Accepted Answer

androgens

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

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 micellesE) B) and D)
F) None of the above

Question 8

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 9

What is the biological precursor of prostaglandins?

Accepted Answer

A)   stearic acid
B)   arachadonic acid
C)   oleic acid
D)   linolenic acidE) All of the above
F) C) and D)

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

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

Accepted Answer

insoluble, soluble

Question 12

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

Accepted Answer

A)   Bile acid
B)   Lipoprotein
C)   Anabolic steroid
D)   Blood plasmaE) B) and D)
F) A) and C)

Question 13

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 14

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

Accepted Answer

A) True 
 B)False

Question 15

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 bilayerF) A) and B)
G) C) and D)

Question 16

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 17

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

Accepted Answer

A)   phospholipid
B)   cholesterol
C)   protein
D)   nucleic acidE) B) and D)
F) A) and D)

Question 18

What is the E/Z configuration of the carbon-carbon double bonds at C-5 and C-13 of prostaglandin F2α? 2α?   A)  5E,13E B)  5E,13Z C)  5Z,13E D)  5Z,13Z" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   5E,13E
B)   5E,13Z
C)   5Z,13E
D)   5Z,13ZE) B) and D)
F) B) and C)

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

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...

Exam 26: Lipids

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

Correct Answer
verified

What is the structure of stearic acid?

Correct Answer
verified

Salts of long chain fatty acids are called detergents.

Correct Answer
verified

Which of the following is not an eicosanoid?

Correct Answer
verified

Male sex hormones like testosterone are called _____________.

Correct Answer
verified
androgens

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

Correct Answer
verified

Which of the following is not true?

Correct Answer
verified

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

What is the biological precursor of prostaglandins?

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified
insoluble, soluble

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

Correct Answer
verified

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

Correct Answer
verified
The saturated side chains of h...
View Answer

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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.

Correct Answer
verified
A triglyceride fat has three long-chain ...
View Answer

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.

Correct Answer
verified
(5Z,8Z,11Z...
View Answer

Exam 26: Lipids

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

Correct AnswerverifiedShow Answer

What is the structure of stearic acid?

Correct AnswerverifiedShow Answer

Salts of long chain fatty acids are called detergents.

Correct AnswerverifiedShow Answer

Which of the following is not an eicosanoid?

Correct AnswerverifiedShow Answer

Male sex hormones like testosterone are called _____________.

Correct Answerverifiedandrogens

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

Correct AnswerverifiedShow Answer

Which of the following is not true?

Correct AnswerverifiedShow Answer

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

What is the biological precursor of prostaglandins?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct Answerverifiedinsoluble, soluble

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedThe saturated side chains of h...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedA triglyceride fat has three long-chain ...View AnswerShow Answer

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.

Correct Answerverified(5Z,8Z,11Z...View AnswerShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
androgens

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
insoluble, soluble

Correct Answer
verified

Correct Answer
verified
The saturated side chains of h...
View Answer

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified
A triglyceride fat has three long-chain ...
View Answer

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.

Correct Answer
verified
(5Z,8Z,11Z...
View Answer