Question 1

Steroids are

Accepted Answer

A) simple esters of long chain alcohols and fatty acids. 
B) esters of glycerol with three predominantly saturated fatty acids. 
C) esters of glycerol with three predominantly unsaturated fatty acids. 
D) based on a tetracyclic ring system with substituents at various positions. 
E) based on a system composed of four adjacent aromatic rings with substituents at various positions. 
A) simple esters of long chain alcohols and fatty acids. 
B) esters of glycerol with three predominantly saturated fatty acids. 
C) esters of glycerol with three predominantly unsaturated fatty acids. 
D) based on a tetracyclic ring system with substituents at various positions. 
E) based on a system composed of four adjacent aromatic rings with substituents at various positions. D

Question 2

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. A

Question 3

Upon hydrolysis,which of the following lipid types would yield a carbohydrate as a product?

Accepted Answer

A) lecithins 
B) glycolipids 
C) cephalins 
D) phospholipids 
A) lecithins 
B) glycolipids 
C) cephalins 
D) phospholipids B

Question 4

A phospholipid with the phosphate ester group bonded to choline would be classified as a

Accepted Answer

A) cephalin. 
B) lecithin. 
C) sphingomyelin. 
D) cerebroside. 
E) ganglioside. 
A) cephalin. 
B) lecithin. 
C) sphingomyelin. 
D) cerebroside. 
E) ganglioside.

Question 5

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 6

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 7

Which reaction can be used to convert oils into fats?

Accepted Answer

A) hydrogenation 
B) hydrolysis 
C) esterification 
D) saponification 
E) dehydration 
A) hydrogenation 
B) hydrolysis 
C) esterification 
D) saponification 
E) dehydration

Question 8

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 9

In chemical terms,soaps can best be described as

Accepted Answer

A) simple esters of fatty acids. 
B) mixed esters of fatty acids. 
C) salts of carboxylic acids. 
D) long chain acids. 
E) bases formed from glycerol. 
A) simple esters of fatty acids. 
B) mixed esters of fatty acids. 
C) salts of carboxylic acids. 
D) long chain acids. 
E) bases formed from glycerol.

Question 10

A protein which lies primarily on the surface of the cell membrane is referred to as a(an)

Accepted Answer

A) liposome. 
B) integral protein. 
C) peripheral protein. 
D) glycoprotein. 
E) cholesterol. 
A) liposome. 
B) integral protein. 
C) peripheral protein. 
D) glycoprotein. 
E) cholesterol.

Question 11

Unsaturated triacylglycerols are usually ________ because ________.

Accepted Answer

A) liquids;they have relatively short fatty acid chains 
B) liquids;the kinks in their fatty acid chains prevent their fitting together closely 
C) liquids;they contain impurities from their natural sources 
D) solids;they have relatively long fatty acid chains 
E) solids;the similar zig-zag shape of their fatty acid chains allows them to fit together closely 
A) liquids;they have relatively short fatty acid chains 
B) liquids;the kinks in their fatty acid chains prevent their fitting together closely 
C) liquids;they contain impurities from their natural sources 
D) solids;they have relatively long fatty acid chains 
E) solids;the similar zig-zag shape of their fatty acid chains allows them to fit together closely

Question 12

The difference in chemical structure between cerebrosides and gangliosides is that gangliosides

Accepted Answer

A) have larger fatty acid molecules than cerebrosides. 
B) contain more complex carbohydrates than cerebrosides. 
C) are found in many kinds of cells,but cerebrosides mainly in brain cells. 
D) are based on glycerol and cerebrosides on sphingosine. 
E) are based on sphingosine and cerebrosides on glycerol. 
A) have larger fatty acid molecules than cerebrosides. 
B) contain more complex carbohydrates than cerebrosides. 
C) are found in many kinds of cells,but cerebrosides mainly in brain cells. 
D) are based on glycerol and cerebrosides on sphingosine. 
E) are based on sphingosine and cerebrosides on glycerol.

Question 13

Phosphoglycerides differ from glycerides in that one of the hydroxyl groups of the glycerol is esterified with

Accepted Answer

A) phosphoric acid. 
B) phosphorous. 
C) choline. 
D) serine. 
A) phosphoric acid. 
B) phosphorous. 
C) choline. 
D) serine.

Question 14

Which C18 fatty acid is a solid at room temperature?

Accepted Answer

A) oleic acid 
B) linoleic acid 
C) linolenic acid 
D) stearic acid 
E) All will be solids at room temperature. 
A) oleic acid 
B) linoleic acid 
C) linolenic acid 
D) stearic acid 
E) All will be solids at room temperature.

Question 15

Which statement about eicosanoids is not correct?

Accepted Answer

A) The parent molecule,arachidonic acid,contains 20 carbon atoms. 
B) Linolenic acid is a precursor to arachidonic acid. 
C) All of the molecules in this category are unsaturated. 
D) Eicosanoids function as "local hormones," acting as short-term chemical messengers. 
E) none of the above 
A) The parent molecule,arachidonic acid,contains 20 carbon atoms. 
B) Linolenic acid is a precursor to arachidonic acid. 
C) All of the molecules in this category are unsaturated. 
D) Eicosanoids function as "local hormones," acting as short-term chemical messengers. 
E) none of the above

Question 16

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 17

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 18

Which of the following is not a biochemical function of waxes?

Accepted Answer

A) prevention of water loss by leaves 
B) waterproofing of feathers in shore birds 
C) energy storage for animals 
D) structural materials in beehives 
E) physical protection of mammalian ears 
A) prevention of water loss by leaves 
B) waterproofing of feathers in shore birds 
C) energy storage for animals 
D) structural materials in beehives 
E) physical protection of mammalian ears

Question 19

Sphingomyelins are composed of sphingosine,a fatty acid,phosphoric acid,and

Accepted Answer

A) choline. 
B) glucose. 
C) galactose. 
D) inositol. 
E) none of the above 
A) choline. 
B) glucose. 
C) galactose. 
D) inositol. 
E) none of the above

Question 20

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.

Exam 23: Lipids

Steroids are

Lecithin is commonly used as a(an)

Upon hydrolysis,which of the following lipid types would yield a carbohydrate as a product?

A phospholipid with the phosphate ester group bonded to choline would be classified as a

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

Triglycerides belong to which general class of organic molecules?

Which reaction can be used to convert oils into fats?

The chemical makeup of fats is

In chemical terms,soaps can best be described as

A protein which lies primarily on the surface of the cell membrane is referred to as a(an)

Unsaturated triacylglycerols are usually ________ because ________.

The difference in chemical structure between cerebrosides and gangliosides is that gangliosides

Phosphoglycerides differ from glycerides in that one of the hydroxyl groups of the glycerol is esterified with

Which C18 fatty acid is a solid at room temperature?

Which statement about eicosanoids is not correct?

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)

Which of the following is not a biochemical function of waxes?

Sphingomyelins are composed of sphingosine,a fatty acid,phosphoric acid,and

The molecule shown can be classified as a(an)

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

Aldehydes and Ketones

Amines

Carboxylic Acids and Their Derivatives

Amino Acids and Proteins

Enzymes and Vitamins

Carbohydrates

The Generation of Biochemical Energy

Carbohydrate Metabolism

Lipid Metabolism

Protein and Amino Acid Metabolism

Nucleic Acids and Protein Synthesis

Genomics

Chemical Messengers: Hormones, neurotransmitters, and Drugs

Body Fluids

Filters

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

Unsaturated triacylglycerols are usually because .

Which C₁₈ fatty acid is a solid at room temperature?

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