Question 1

Cholesterol is implicated as a potential cause of atherosclerosis because it

Accepted Answer

A) acts as a precursor to steroid hormones. 
B) takes part in the reactions that produce bile acids. 
C) maintains structure because of its flat rigid characteristics. 
D) attracts hydrophobic molecules to form solid deposits. 
E) none of the above 
A) acts as a precursor to steroid hormones. 
B) takes part in the reactions that produce bile acids. 
C) maintains structure because of its flat rigid characteristics. 
D) attracts hydrophobic molecules to form solid deposits. 
E) none of the above

Question 2

Which molecule is an unsaturated fatty acid?

Accepted Answer

A) lauric acid 
B) linoleic acid 
C) myristic acid 
D) butyric acid 
E) stearic acid 
A) lauric acid 
B) linoleic acid 
C) myristic acid 
D) butyric acid 
E) stearic acid

Question 3

The carbohydrate portion of a glycolipid extends ________ in order to allow the molecule to function as a ________.

Accepted Answer

A) into the extracellular fluid; receptor site 
B) into the extracellular fluid; transport channel 
C) into the intracellular fluid; transport channel 
D) into the intracellular fluid; receptor site 
E) laterally within the bilayer; fluid membrane 
A) into the extracellular fluid; receptor site 
B) into the extracellular fluid; transport channel 
C) into the intracellular fluid; transport channel 
D) into the intracellular fluid; receptor site 
E) laterally within the bilayer; fluid membrane

Question 4

The molecule shown can be classified as a(an)

Accepted Answer

A) steroid. 
B) eicosanoid. 
C) wax. 
D) glycerophospholipid. 
E) sphingolipid. 
A) steroid. 
B) eicosanoid. 
C) wax. 
D) glycerophospholipid. 
E) sphingolipid.

Question 5

The chemical makeup of fats is

Accepted Answer

A) simple esters of long chain alcohols and fatty acids. 
B) esters of glycerol with three identical saturated fatty acids. 
C) esters of glycerol with three identical unsaturated fatty acids. 
D) esters of glycerol with three predominantly saturated fatty acids. 
E) esters of glycerol with three predominantly unsaturated fatty acids. 
A) simple esters of long chain alcohols and fatty acids. 
B) esters of glycerol with three identical saturated fatty acids. 
C) esters of glycerol with three identical unsaturated fatty acids. 
D) esters of glycerol with three predominantly saturated fatty acids. 
E) esters of glycerol with three predominantly unsaturated fatty acids.

Question 6

The hydrocarbon end of a soap molecule is

Accepted Answer

A) hydrophilic and attracted to grease. 
B) hydrophobic and attracted to grease. 
C) hydrophilic and attracted to water. 
D) hydrophobic and attracted to water. 
E) neither hydrophobic nor hydrophilic. 
A) hydrophilic and attracted to grease. 
B) hydrophobic and attracted to grease. 
C) hydrophilic and attracted to water. 
D) hydrophobic and attracted to water. 
E) neither hydrophobic nor hydrophilic.

Question 7

Which molecule is an unsaturated fatty acid?

Accepted Answer

A) CH3(CH2)14COOH 
B) CH3(CH2)7CH=CH(CH2)7COOH 
C) CH3CH=CHCH2COOH 
D) (CH3)2CH(CH2)3COOH 
E) none of the above 
A) CH3(CH2)14COOH 
B) CH3(CH2)7CH=CH(CH2)7COOH 
C) CH3CH=CHCH2COOH 
D) (CH3)2CH(CH2)3COOH 
E) none of the above

Question 8

Fats and oils can be referred to by the general term ________ because ________.

Accepted Answer

A) phospholipids; they are formed when any one of the three ester groups is replaced by a phosphate group 
B) triglycerides; they are formed when any one of the three functional groups of glycerol reacts with a fatty acid 
C) triacylglycerols; they are formed by reaction of 1,2,3-propanetriol with three fatty acids 
D) soaps; they can undergo saponification reactions 
E) steroids; they have a specific tetracyclic ring structure 
A) phospholipids; they are formed when any one of the three ester groups is replaced by a phosphate group 
B) triglycerides; they are formed when any one of the three functional groups of glycerol reacts with a fatty acid 
C) triacylglycerols; they are formed by reaction of 1,2,3-propanetriol with three fatty acids 
D) soaps; they can undergo saponification reactions 
E) steroids; they have a specific tetracyclic ring structure

Question 9

Prostaglandins

Accepted Answer

A) are produced by prostate gland and have a hormone function. 
B) are involved in the reproductive processes of the human female. 
C) are inhibited by the drug aspirin. 
D) All of these are correct statements. 
E) None of these are correct statements. 
A) are produced by prostate gland and have a hormone function. 
B) are involved in the reproductive processes of the human female. 
C) are inhibited by the drug aspirin. 
D) All of these are correct statements. 
E) None of these are correct statements.

Question 10

Substances originating in plant or animal material and soluble in non-polar organic solvents are classified as

Accepted Answer

A) carbohydrates. 
B) lipids. 
C) nucleic acids 
D) proteins. 
E) amino acids. 
A) carbohydrates. 
B) lipids. 
C) nucleic acids 
D) proteins. 
E) amino acids.

Question 11

Match the following.
-unsaturated

Accepted Answer

A) describes fatty acids that have mostly single but at least one double carbon-carbon bond 
B) describes the non-polar portion of a molecule that does not interact with water or other polar substances 
C) a process of transport in which integral proteins change shape to allow a substance to cross a cell membrane 
D) describes fatty acids that do not have any carbon-carbon double bonds 
E) a process of transport that costs energy because the flow is against the concentration gradient
F)describes fatty acids that have mostly single but more than one double carbon-carbon bond
G)a process of transport in which substances cross a membrane based on concentration differences without the expenditure of energy
H)describes the polar portion of a molecule that interacts readily with water or other polar substances 
A) describes fatty acids that have mostly single but at least one double carbon-carbon bond 
B) describes the non-polar portion of a molecule that does not interact with water or other polar substances 
C) a process of transport in which integral proteins change shape to allow a substance to cross a cell membrane 
D) describes fatty acids that do not have any carbon-carbon double bonds 
E) a process of transport that costs energy because the flow is against the concentration gradient
F)describes fatty acids that have mostly single but more than one double carbon-carbon bond
G)a process of transport in which substances cross a membrane based on concentration differences without the expenditure of energy
H)describes the polar portion of a molecule that interacts readily with water or other polar substances

Question 12

The chemical makeup of a wax is

Accepted Answer

A) a simple ester of a long chain alcohol and a fatty acid. 
B) an ester of glycerol with three identical saturated fatty acids. 
C) an ester of glycerol with three identical unsaturated fatty acids. 
D) an ester of glycerol with three predominantly saturated fatty acids. 
E) an ester of glycerol with three predominantly unsaturated fatty acids. 
A) a simple ester of a long chain alcohol and a fatty acid. 
B) an ester of glycerol with three identical saturated fatty acids. 
C) an ester of glycerol with three identical unsaturated fatty acids. 
D) an ester of glycerol with three predominantly saturated fatty acids. 
E) an ester of glycerol with three predominantly unsaturated fatty acids.

Question 13

Glycolipids are similar in structure to sphingomyelins,except that the phosphate group has been replaced by a(an)

Accepted Answer

A) choline derivative. 
B) carbohydrate. 
C) fatty acid. 
D) amino acid. 
E) nucleic acid. 
A) choline derivative. 
B) carbohydrate. 
C) fatty acid. 
D) amino acid. 
E) nucleic acid.

Question 14

Steroids are classified as lipids because they have a distinguishing feature that they

Accepted Answer

A) dissolve in nonpolar solvents. 
B) are present in biological membranes. 
C) can be saponified. 
D) have a ring structure. 
A) dissolve in nonpolar solvents. 
B) are present in biological membranes. 
C) can be saponified. 
D) have a ring structure.

Question 15

Triglycerides belong to which general class of organic molecules?

Accepted Answer

A) esters 
B) alcohols 
C) carboxylic acids 
D) ketones 
E) ethers 
A) esters 
B) alcohols 
C) carboxylic acids 
D) ketones 
E) ethers

Question 16

The molecule shown can be classified as a(an)

Accepted Answer

A) wax. 
B) glycerophospholipid. 
C) sphingolipid. 
D) glycolipid. 
E) triacylglycerol. 
A) wax. 
B) glycerophospholipid. 
C) sphingolipid. 
D) glycolipid. 
E) triacylglycerol.

Question 17

Lecithin is commonly used as a(an)

Accepted Answer

A) emulsifying agent. 
B) lubricant. 
C) drying agent. 
D) precipitating agent. 
E) dispersant. 
A) emulsifying agent. 
B) lubricant. 
C) drying agent. 
D) precipitating agent. 
E) dispersant.

Question 18

Match the following.
-saturated

Accepted Answer

A) describes fatty acids that have mostly single but at least one double carbon-carbon bond 
B) describes the non-polar portion of a molecule that does not interact with water or other polar substances 
C) a process of transport in which integral proteins change shape to allow a substance to cross a cell membrane 
D) describes fatty acids that do not have any carbon-carbon double bonds 
E) a process of transport that costs energy because the flow is against the concentration gradient
F)describes fatty acids that have mostly single but more than one double carbon-carbon bond
G)a process of transport in which substances cross a membrane based on concentration differences without the expenditure of energy
H)describes the polar portion of a molecule that interacts readily with water or other polar substances 
A) describes fatty acids that have mostly single but at least one double carbon-carbon bond 
B) describes the non-polar portion of a molecule that does not interact with water or other polar substances 
C) a process of transport in which integral proteins change shape to allow a substance to cross a cell membrane 
D) describes fatty acids that do not have any carbon-carbon double bonds 
E) a process of transport that costs energy because the flow is against the concentration gradient
F)describes fatty acids that have mostly single but more than one double carbon-carbon bond
G)a process of transport in which substances cross a membrane based on concentration differences without the expenditure of energy
H)describes the polar portion of a molecule that interacts readily with water or other polar substances

Question 19

The basic structure of cell membranes consists of

Accepted Answer

A) protein micelles studded with phospholipids. 
B) protein bilayers studded with phospholipids. 
C) one protein layer and one phospholipid layer. 
D) phospholipid micelles studded with proteins. 
E) phospholipid bilayers studded with proteins. 
A) protein micelles studded with phospholipids. 
B) protein bilayers studded with phospholipids. 
C) one protein layer and one phospholipid layer. 
D) phospholipid micelles studded with proteins. 
E) phospholipid bilayers studded with proteins.

Exam 23: Lipids

Cholesterol is implicated as a potential cause of atherosclerosis because it

Which molecule is an unsaturated fatty acid?

The carbohydrate portion of a glycolipid extends ________ in order to allow the molecule to function as a ________.

The molecule shown can be classified as a(an)

The chemical makeup of fats is

The hydrocarbon end of a soap molecule is

Which molecule is an unsaturated fatty acid?

Fats and oils can be referred to by the general term ________ because ________.

Prostaglandins

Substances originating in plant or animal material and soluble in non-polar organic solvents are classified as

Match the following. -unsaturated

The chemical makeup of a wax is

Glycolipids are similar in structure to sphingomyelins,except that the phosphate group has been replaced by a(an)

Steroids are classified as lipids because they have a distinguishing feature that they

Triglycerides belong to which general class of organic molecules?

The molecule shown can be classified as a(an)

Lecithin is commonly used as a(an)

Match the following. -saturated

The basic structure of cell membranes consists of

Matter and Measurements

Atoms and the Periodic Table

Ionic Compounds

Molecular Compounds

Classification and Balancing of Chemical Reactions

Chemical Reactions: Mole and Mass Relationships

Chemical Reactions: Energy, rates, and Equilibrium

Gases, liquids, and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Chemistry: Alkanes

Alkenes, alkynes, and Aromatic Compounds

Some Compounds With Oxygen, sulfur, or a Halogen

Amines

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Amino Acids and Proteins

Enzymes and Vitamins

The Generation of Biochemical Energy

Carbohydrates

Carbohydrate Metabolism

Lipid Metabolism

Nucleic Acids and Protein Synthesis

Genomics

Protein and Amino Acid Metabolism

Chemical Messengers: Hormones, neurotransmitters, and Drugs

Body Fluids

Filters

The carbohydrate portion of a glycolipid extends in order to allow the molecule to function as a .

Fats and oils can be referred to by the general term because .