Question 1

What is the common name for the fatty acid with the condensed structure shown below? CH3(CH2)10COOH

Accepted Answer

A) lauric acid 
B) oleic acid 
C) capric acid 
D) linoleic acid 
E) arachidonic acid 
A) lauric acid 
B) oleic acid 
C) capric acid 
D) linoleic acid 
E) arachidonic acid

Question 2

The melting point of saturated fatty acids decreases with increasing number of carbons.

Accepted Answer

A) True 
 B)False

Question 3

What two products are formed in the hydrolysis of a wax?

Accepted Answer

A) a long-chain alcohol and an ester 
B) a fatty acid and an ester 
C) a fatty acid and a long-chain alcohol 
D) a triglyceride and a soap 
E) an alcohol and a bile salt 
A) a long-chain alcohol and an ester 
B) a fatty acid and an ester 
C) a fatty acid and a long-chain alcohol 
D) a triglyceride and a soap 
E) an alcohol and a bile salt

Question 4

What nitrogen-containing alcohol forms the backbone of the sphingolipids?

Accepted Answer

A) ethanolamine 
B) ammonia 
C) aniline 
D) cortisol 
E) sphingosine 
A) ethanolamine 
B) ammonia 
C) aniline 
D) cortisol 
E) sphingosine

Question 5

A strong correlation exists between heart disease and the concentration of cholesterol found in blood plasma.

Accepted Answer

A) True 
 B)False

Question 6

How can the structure and composition of biological membranes be best described?

Accepted Answer

A) lipid bilayer 
B) protein micelle 
C) hydrophilic barrier 
D) emulsifying layer 
E) saturated triglyceride 
A) lipid bilayer 
B) protein micelle 
C) hydrophilic barrier 
D) emulsifying layer 
E) saturated triglyceride

Question 7

The two essential fatty acids are oleic and linoleic acid.

Accepted Answer

A) True 
 B)False

Question 8

What is the name of the product that results from the hydrogenation reaction below?

Accepted Answer

A) stearic acid 
B) arachidic acid 
C) palmitic acid 
D) linoleic acid 
E) capric acid 
A) stearic acid 
B) arachidic acid 
C) palmitic acid 
D) linoleic acid 
E) capric acid

Question 9

Which class of human plasma lipoproteins binds triglycerides synthesized in the liver and carries them to adipose for storage?

Accepted Answer

A) chylomicrons 
B) high density lipoproteins (HDL) 
C) low density lipoproteins (LDL) 
D) very low density lipoproteins (VLDL) 
E) sphingomyelins 
A) chylomicrons 
B) high density lipoproteins (HDL) 
C) low density lipoproteins (LDL) 
D) very low density lipoproteins (VLDL) 
E) sphingomyelins

Question 10

Which class of lipoprotein carries cholesterol to peripheral tissues and helps regulate cholesterol levels in those tissues?

Accepted Answer

A) chylomicrons 
B) high density lipoproteins (HDL) 
C) low density lipoproteins (LDL) 
D) very low density lipoproteins (VLDL) 
E) sphingomyelins 
A) chylomicrons 
B) high density lipoproteins (HDL) 
C) low density lipoproteins (LDL) 
D) very low density lipoproteins (VLDL) 
E) sphingomyelins

Question 11

What is the IUPAC name of the carboxylic acid formed by the hydrogenation of oleic acid (cis-9-octadecenoic acid)?

Accepted Answer

A) trans-9-octadecenoic acid 
B) octadecanoic acid 
C) octadecenoic acid 
D) 9-octadecenoic acid 
E) octadecanol 
A) trans-9-octadecenoic acid 
B) octadecanoic acid 
C) octadecenoic acid 
D) 9-octadecenoic acid 
E) octadecanol

Question 12

Painful menstruation may be the result of an excess of which of the following eicosanoids?

Accepted Answer

A) leukotrienes 
B) thromboxanes 
C) prostaglandins 
D) steroids 
E) phospholipids 
A) leukotrienes 
B) thromboxanes 
C) prostaglandins 
D) steroids 
E) phospholipids

Question 13

Sphingomyelins are a type of sphingolipid,cell membrane lipids that contain sphingosine,an 18-carbon amino alcohol,as the backbone of the structure.What type of bond joins the fatty acid portion of the sphingomyelin molecule to the sphingosine backbone?

Accepted Answer

A) C=C bond 
B) amide bond 
C) ionic bond 
D) phosphodiester bond 
E) hydrogen bond 
A) C=C bond 
B) amide bond 
C) ionic bond 
D) phosphodiester bond 
E) hydrogen bond

Question 14

How does the proportion of saturation and unsaturation in membrane lipids affect the fluidity of the cell membrane?

Accepted Answer

A) Membrane fluidity increases with an increase in the percentage of unsaturation. 
B) Membrane fluidity decreases with an increase in the percentage of unsaturation. 
C) Membrane fluidity increases with an increase in the percentage of saturation. 
D) Membranes are most fluid when there is an equal proportion of saturation and unsaturation. 
E) Membrane fluidity depends only on the size of the carbon chains,and not on the proportions of saturation and unsaturation. 
A) Membrane fluidity increases with an increase in the percentage of unsaturation. 
B) Membrane fluidity decreases with an increase in the percentage of unsaturation. 
C) Membrane fluidity increases with an increase in the percentage of saturation. 
D) Membranes are most fluid when there is an equal proportion of saturation and unsaturation. 
E) Membrane fluidity depends only on the size of the carbon chains,and not on the proportions of saturation and unsaturation.

Question 15

All lipid molecules are characterized by having a polar "head" and a nonpolar "tail."

Accepted Answer

A) True 
 B)False

Question 16

Which of the following best describes the composition of the carbon chain in a saturated fatty acid?

Accepted Answer

A) contains cis- and trans- C=C (double)bonds 
B) contains only C−C (single)bonds 
C) contains at least one C−C (double)bond 
D) contains only C=C (double)bonds 
E) contains alternating C−C (single)and C=C (double)bonds 
A) contains cis- and trans- C=C (double)bonds 
B) contains only C−C (single)bonds 
C) contains at least one C−C (double)bond 
D) contains only C=C (double)bonds 
E) contains alternating C−C (single)and C=C (double)bonds

Question 17

Testosterone,cholesterol,and progesterone are all classified as steroids because they contain the steroid nucleus.Which of the following compounds would also be classified as a steroid?

Accepted Answer

A) I only 
B) II only 
C) III only 
D) I and II 
E) I,II,and III 
A) I only 
B) II only 
C) III only 
D) I and II 
E) I,II,and III

Question 18

Which of the following is NOT a lipid?

Accepted Answer

A) fatty acids 
B) glycerides 
C) waxes 
D) lipoproteins 
E) All of the choices are correct. 
A) fatty acids 
B) glycerides 
C) waxes 
D) lipoproteins 
E) All of the choices are correct.

Question 19

What is the product of the complete hydrogenation of linoleic acid?

Accepted Answer

A) sodium linoleate 
B) a diol 
C) arachidonic acid 
D) an ester 
E) stearic acid 
A) sodium linoleate 
B) a diol 
C) arachidonic acid 
D) an ester 
E) stearic acid

Question 20

Organisms that live at high temperatures tend to have higher proportions of unsaturated fatty acids in their cell membranes.

Accepted Answer

A) True 
 B)False

Exam 17: Lipids and Their Functions in Biochemical Systems

What is the common name for the fatty acid with the condensed structure shown below? CH3(CH2)10COOH

The melting point of saturated fatty acids decreases with increasing number of carbons.

What two products are formed in the hydrolysis of a wax?

What nitrogen-containing alcohol forms the backbone of the sphingolipids?

A strong correlation exists between heart disease and the concentration of cholesterol found in blood plasma.

How can the structure and composition of biological membranes be best described?

The two essential fatty acids are oleic and linoleic acid.

What is the name of the product that results from the hydrogenation reaction below?

Which class of human plasma lipoproteins binds triglycerides synthesized in the liver and carries them to adipose for storage?

Which class of lipoprotein carries cholesterol to peripheral tissues and helps regulate cholesterol levels in those tissues?

What is the IUPAC name of the carboxylic acid formed by the hydrogenation of oleic acid (cis-9-octadecenoic acid)?

Painful menstruation may be the result of an excess of which of the following eicosanoids?

Sphingomyelins are a type of sphingolipid,cell membrane lipids that contain sphingosine,an 18-carbon amino alcohol,as the backbone of the structure.What type of bond joins the fatty acid portion of the sphingomyelin molecule to the sphingosine backbone?

How does the proportion of saturation and unsaturation in membrane lipids affect the fluidity of the cell membrane?

All lipid molecules are characterized by having a polar "head" and a nonpolar "tail."

Which of the following best describes the composition of the carbon chain in a saturated fatty acid?

Testosterone,cholesterol,and progesterone are all classified as steroids because they contain the steroid nucleus.Which of the following compounds would also be classified as a steroid?

Which of the following is NOT a lipid?

What is the product of the complete hydrogenation of linoleic acid?

Organisms that live at high temperatures tend to have higher proportions of unsaturated fatty acids in their cell membranes.

Chemistry - Methods and Measurement

The Structure of the Atom and the Periodic Table

Structure and Properties of Ionic and Covalent Compounds

Calculations, chemical Changes, and the Chemical Equation

States of Matter: Gases, liquids, and Solids

Solutions

Energy,rate and Equilibrium

Acids and Bases

The Nucleus, radioactivity, and Nuclear Medicine

An Introduction to Organic Chemistry

The Unsaturated Hydrocarbons: Alkenes, alkynes, and Aromatics

Alcohols, phenols, thiols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Carboxylic Acid Derivatives

Amines and Amides

Carbohydrates

Protein Structure and Function

Enzymes

Introduction to Molecular Genetics

Carbohydrate Metabolism

Aerobic Respiration and Energy Production

Fatty Acid Metabolism

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What is the common name for the fatty acid with the condensed structure shown below? CH₃(CH₂)₁₀COOH