Question 1

Vitamins D, K, and E would be found stored in fatty tissues because they are

Accepted Answer

A)  made from proteins. 
B)  glycogen intermediates. 
C)  hydrophilic. 
D)  lipids. 
E)  minerals. 
A)  made from proteins. 
B)  glycogen intermediates. 
C)  hydrophilic. 
D)  lipids. 
E)  minerals.

Question 2

The magnesium chelatase protein has quaternary structure.This means that magnesium chelatase

Accepted Answer

A)  is composed of subunits. 
B)  binds to the surface of membranes. 
C)  forms part of a quadruple complex. 
D)  changes over time. 
E)  has fourfold symmetry. 
A)  is composed of subunits. 
B)  binds to the surface of membranes. 
C)  forms part of a quadruple complex. 
D)  changes over time. 
E)  has fourfold symmetry.

Question 3

Tertiary and quaternary structures share all of the following properties except

Accepted Answer

A)  disulfide bridges. 
B)  multiple subunits. 
C)  hydrogen bonding. 
D)  ionic interactions. 
E)  van der Waals interactions. 
A)  disulfide bridges. 
B)  multiple subunits. 
C)  hydrogen bonding. 
D)  ionic interactions. 
E)  van der Waals interactions.

Question 4

Starch and glycogen, which are both polysaccharides, differ in that starch _______, while glycogen _______.

Accepted Answer

A)  is the main component for plant structural support; is an energy source for animals 
B)  is a structural material found in plants and animals; forms external skeletons in animals 
C)  is the principal energy storage compound of plants; is the main energy storage in animals 
D)  is a temporary compound used to store glucose; is a highly stable compound that stores complex lipids 
E)  is the main energy storage in animals; is a temporary compound used to store glucose 
A)  is the main component for plant structural support; is an energy source for animals 
B)  is a structural material found in plants and animals; forms external skeletons in animals 
C)  is the principal energy storage compound of plants; is the main energy storage in animals 
D)  is a temporary compound used to store glucose; is a highly stable compound that stores complex lipids 
E)  is the main energy storage in animals; is a temporary compound used to store glucose

Question 5

Refer to the figure below.   This compound was found covering the surface of a plant leaf.Which is the most likely biological function for this compound, given its structure and location in a plant?

Accepted Answer

A)  Water retention 
B)  Regulation of cell metabolism 
C)  Thermal insulation 
D)  Light energy harvesting 
E)  Energy storage 
A)  Water retention 
B)  Regulation of cell metabolism 
C)  Thermal insulation 
D)  Light energy harvesting 
E)  Energy storage

Question 6

Refer to the table and figures below.     A student is creating a table showing lipids and their biological functions.He drew three molecular structures to represent lipids A, B, and C.The capital letter _______ should be placed to the left of the function listed.

Accepted Answer

The answer of Refer to the table and figures below....

Question 7

During the formation of a peptide linkage, a(n) _______ is formed.

Accepted Answer

A)  molecule of water 
B)  disulfide bridge 
C)  hydrophobic bond 
D)  hydrophilic bond 
E)  ionic bond 
A)  molecule of water 
B)  disulfide bridge 
C)  hydrophobic bond 
D)  hydrophilic bond 
E)  ionic bond

Question 8

Which amino acid does not have a charged R group?

Accepted Answer

A)  Arginine 
B)  Histidine 
C)  Lysine 
D)  Asparagine 
E)  Glutamic acid 
A)  Arginine 
B)  Histidine 
C)  Lysine 
D)  Asparagine 
E)  Glutamic acid

Question 9

Steroids are classified as lipids because they

Accepted Answer

A)  have a ring structure similar to glucose. 
B)  are amphipathic. 
C)  are composed of nonpolar and hydrophobic functional groups. 
D)  are composed of molecules that are bound together with glycosidic linkages. 
E)  form F1F1F1S1F1F1F10 and F1F1F1S1F1F1F10 isomers. 
A)  have a ring structure similar to glucose. 
B)  are amphipathic. 
C)  are composed of nonpolar and hydrophobic functional groups. 
D)  are composed of molecules that are bound together with glycosidic linkages. 
E)  form F1F1F1S1F1F1F10 and F1F1F1S1F1F1F10 isomers.

Question 10

Refer to the figure showing the structure of one molecule making up a lipid bilayer.   Section 3 and 4 form the tail, which occupies the interior portion of the bilayer, and section _______ forms the head, which comes into contact with the aqueous environment.

Accepted Answer

The answer of Refer to the figure showing the structure...

Question 11

All of the following can result in the misfolding of a protein except

Accepted Answer

A)  the addition of chaperones. 
B)  denaturation. 
C)  placement in a polar substance. 
D)  a pH of 9. 
E)  placement in a nonpolar substance. 
A)  the addition of chaperones. 
B)  denaturation. 
C)  placement in a polar substance. 
D)  a pH of 9. 
E)  placement in a nonpolar substance.

Question 12

Cholesterol

Accepted Answer

A)  is a vitamin. 
B)  is classified as a carbohydrate. 
C)  must be taken up in an animal's diet. 
D)  is involved in membrane integrity. 
E)  is hydrophilic. 
A)  is a vitamin. 
B)  is classified as a carbohydrate. 
C)  must be taken up in an animal's diet. 
D)  is involved in membrane integrity. 
E)  is hydrophilic.

Question 13

Which is least likely to denature an enzyme?

Accepted Answer

A)  Urea 
B)  Vinegar 
C)  Milk 
D)  Boiling water 
E)  Bleach 
A)  Urea 
B)  Vinegar 
C)  Milk 
D)  Boiling water 
E)  Bleach

Question 14

Which level(s) of protein structure would be destroyed by the addition of a denaturing reagent?

Accepted Answer

A)  Primary only 
B)  Secondary only 
C)  Tertiary only 
D)  Secondary and tertiary 
E)  Primary, secondary, and tertiary 
A)  Primary only 
B)  Secondary only 
C)  Tertiary only 
D)  Secondary and tertiary 
E)  Primary, secondary, and tertiary

Question 15

Aspartate and glutamate can form hydrogen bonds with water because they

Accepted Answer

A)  are hydrophobic. 
B)  have sulfur atoms in their side chains. 
C)  have electrically charged side chains. 
D)  are nonpolar. 
E)  form only left-handed isomers. 
A)  are hydrophobic. 
B)  have sulfur atoms in their side chains. 
C)  have electrically charged side chains. 
D)  are nonpolar. 
E)  form only left-handed isomers.

Question 16

Refer to the figures below showing the structures of cellulose and chitin.   What is a difference that distinguishes these two polysaccharides from each other?

Accepted Answer

A)  One contains a hexose monomer, while the other contains a pentose monomer. 
B)  One is a linear polymer, while the other is branched. 
C)  One contains F1F1F1S1F1F1F10-1,4 glycosidic linkages, while the other contains F1F1F1S1F1F1F10-1,4 glycosidic linkages. 
D)  One contains glucose monomers, while the other contains N-acetyl-glucosamine monomers. 
E)  One contains glucose monomers, while the other contains glucosamine monomers. 
A)  One contains a hexose monomer, while the other contains a pentose monomer. 
B)  One is a linear polymer, while the other is branched. 
C)  One contains F1F1F1S1F1F1F10-1,4 glycosidic linkages, while the other contains F1F1F1S1F1F1F10-1,4 glycosidic linkages. 
D)  One contains glucose monomers, while the other contains N-acetyl-glucosamine monomers. 
E)  One contains glucose monomers, while the other contains glucosamine monomers.

Question 17

Refer to the table below.   Not all vitamins are classified as lipids.From the table above, vitamins _______ would be considered lipids.

Accepted Answer

The answer of Refer to the table below.  ...

Question 18

Glucose

Accepted Answer

A)  is a disaccharide. 
B)  is broken down for energy. 
C)  is a pentose. 
D)  has six hydrogens. 
E)  is a polysaccharide. 
A)  is a disaccharide. 
B)  is broken down for energy. 
C)  is a pentose. 
D)  has six hydrogens. 
E)  is a polysaccharide.

Question 19

Refer to the table below, which shows data collected by a research group investigating properties of a protein that catalyzes a chemical reaction in bacterial cells.The group isolated the protein from bacteria with normal function (native protein) and from three colonies of bacteria that had been treated with a chemical mutagen (mutants 1, 2, and 3).   Which statement is true and is supported by the results shown in the table?

Accepted Answer

A)  The quaternary structure of a protein is destroyed by any change in its primary structure. 
B)  The tertiary structure of a protein is destroyed by any change in its primary structure. 
C)  Changes in primary structure can affect a protein's biological function without affecting its quaternary structure. 
D)  The same amino acids are responsible for determining a protein's biological function and its quaternary structure. 
E)  Any changes that disrupt a protein's quaternary structure cause disruptive changes in the protein's tertiary structure as well. 
A)  The quaternary structure of a protein is destroyed by any change in its primary structure. 
B)  The tertiary structure of a protein is destroyed by any change in its primary structure. 
C)  Changes in primary structure can affect a protein's biological function without affecting its quaternary structure. 
D)  The same amino acids are responsible for determining a protein's biological function and its quaternary structure. 
E)  Any changes that disrupt a protein's quaternary structure cause disruptive changes in the protein's tertiary structure as well.

Question 20

Refer to the diagram of a polysaccharide below.   The monosaccharides shown in the diagram are linked by

Accepted Answer

A)  disulfide bridges. 
B)  glycosidic linkages. 
C)  peptide bonds. 
D)  noncovalent bonds. 
E)  ionic bonds. 
A)  disulfide bridges. 
B)  glycosidic linkages. 
C)  peptide bonds. 
D)  noncovalent bonds. 
E)  ionic bonds.

Exam 3: Proteins, Carbohydrates, and Lipids

Vitamins D, K, and E would be found stored in fatty tissues because they are

The magnesium chelatase protein has quaternary structure.This means that magnesium chelatase

Tertiary and quaternary structures share all of the following properties except

Starch and glycogen, which are both polysaccharides, differ in that starch _______, while glycogen _______.

Refer to the figure below. This compound was found covering the surface of a plant leaf.Which is the most likely biological function for this compound, given its structure and location in a plant?

Refer to the table and figures below. A student is creating a table showing lipids and their biological functions.He drew three molecular structures to represent lipids A, B, and C.The capital letter _______ should be placed to the left of the function listed.

During the formation of a peptide linkage, a(n) _______ is formed.

Which amino acid does not have a charged R group?

Steroids are classified as lipids because they

Refer to the figure showing the structure of one molecule making up a lipid bilayer. Section 3 and 4 form the tail, which occupies the interior portion of the bilayer, and section _______ forms the head, which comes into contact with the aqueous environment.

All of the following can result in the misfolding of a protein except

Cholesterol

Which is least likely to denature an enzyme?

Which level(s) of protein structure would be destroyed by the addition of a denaturing reagent?

Aspartate and glutamate can form hydrogen bonds with water because they

Refer to the figures below showing the structures of cellulose and chitin. What is a difference that distinguishes these two polysaccharides from each other?

Refer to the table below. Not all vitamins are classified as lipids.From the table above, vitamins _______ would be considered lipids.

Glucose

Refer to the diagram of a polysaccharide below. The monosaccharides shown in the diagram are linked by

Studying Life

Small Molecules and the Chemistry of Life

Nucleic Acids and the Origin of Life

Cells: the Working Units of Life

Cell Membranes

Cell Communication and Multicellularity

Energy, Enzymes, and Metabolism

Pathways That Harvest Chemical Energy

Photosynthesis: Energy From Sunlight

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

Dna and Its Role in Heredity

From Dna to Protein: Gene Expression

Gene Mutation and Molecular Medicine

Regulation of Gene Expression

Genomes

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Starch and glycogen, which are both polysaccharides, differ in that starch _, while glycogen _.