Question 1

What type of covalent bond between amino acid side chains (R groups) functions in maintaining a polypeptide's specific three-dimensional shape?

Accepted Answer

A)  ionic bond
B)  hydrophobic interaction
C)  van der Waals interaction
D)  disulphide bond
E)  hydrogen bondF) C) and D)
G) A) and D)

Question 2

The following questions are based on the 15 molecules illustrated in the figure below.Each molecule may be used once,more than once,or not at all.
 
-Which of the following combinations could be linked together to form a nucleotide?

Accepted Answer

A)  1, 2, and 11
B)  3, 7, and 8
C)  5, 9, and 10
D)  11, 12, and 13
E)  12, 14, and 15F) A) and C)
G) C) and D)

Question 3

Humans and mice differ because of which of the following?

Accepted Answer

A)  Their cells have different small organic molecules.
B)  Their cells make different types of large biological molecules.
C)  Their cells make different types of lipids.
D)  Their cells have some differences in the sequence of nucleotides in their nucleic acids.
E)  Their cells make different types of proteins.F) B) and E)
G) C) and D)

Question 4

A glycosidic linkage is analogous to which of the following in proteins?

Accepted Answer

A)  an amino group
B)  a peptide bond
C)  a disulfide bond
D)  a β pleated sheet
E)  an α helixF) A) and B)
G) None of the above

Question 5

The genome of humans and chimpanzees are ________ identical.

Accepted Answer

A)  less than 50%
B)  70-75%
C)  85-90%
D)  95-98%
E)  100%F) C) and E)
G) C) and D)

Question 6

Use the following information to answer the questions below.
You have just had a breakfast of toast (high-fibre bread) with butter and jam (no added sugar) along with a glass of milk.
-Which of the following categories includes all others in the list?

Accepted Answer

A)  monosaccharide
B)  disaccharide
C)  starch
D)  carbohydrate
E)  polysaccharideF) B) and C)
G) C) and E)

Question 7

The following questions are based on the 15 molecules illustrated in the figure below.Each molecule may be used once,more than once,or not at all.
 
-Which of the following molecules is a purine type of nitrogenous base?

Accepted Answer

A)  2
B)  3
C)  5
D)  12
E)  13F) B) and E)
G) A) and B)

Question 8

The basis for diversity,both within a species and among species,is a result of the

Accepted Answer

A)  arrangement of a few base molecules into many different macromolecular combinations.
B)  shared structures of polymers and lipids.
C)  infinite number of base molecules to build from.
D)  ratio of lipid to protein.
E)  fact that some individuals have mutations.F) A) and C)
G) A) and B)

Question 9

What is the difference between an aldose sugar and a ketose sugar?

Accepted Answer

A)  the number of carbons
B)  the position of the hydroxyl groups
C)  the position of the carbonyl group
D)  One is a ring form, and the other is a linear chain.
E)  One has a nitrogen.F) B) and D)
G) A) and B)

Question 10

Which of the following is not a polymer?

Accepted Answer

A)  glucose
B)  starch
C)  cellulose
D)  chitin
E)  DNAF) C) and D)
G) C) and E)

Question 11

The bonding of two amino acid molecules to form a larger molecule requires

Accepted Answer

A)  the release of a water molecule.
B)  the release of a carbon dioxide molecule.
C)  the addition of a nitrogen atom.
D)  the addition of a water molecule.
E)  the release of a nitrous oxide molecule.F) B) and E)
G) B) and D)

Question 12

Which of the following statements best summarizes the differences between DNA and RNA?

Accepted Answer

A)  DNA encodes hereditary information, whereas RNA does not.
B)  The bases in DNA form base-paired duplexes, whereas the bases in RNA do not.
C)  DNA nucleotides contain a different sugar than RNA nucleotides.
D)  DNA contains the base uracil, whereas RNA contains the base thymine.
E)  DNA encodes hereditary information, whereas RNA does not; the bases in DNA form base-paired duplexes, whereas the bases in RNA do not; and DNA nucleotides contain a different sugar than RNA nucleotides.F) None of the above
G) C) and D)

Question 13

What is the term used for a protein molecule that assists in the proper folding of other proteins?

Accepted Answer

A)  tertiary protein
B)  chaperonin
C)  enzyme protein
D)  renaturing protein
E)  denaturing proteinF) A) and E)
G) B) and C)

Question 14

What maintains the secondary structure of a protein?

Accepted Answer

A)  peptide bonds
B)  hydrogen bonds between the amino group of one peptide bond and the carboxyl group of another peptide bond
C)  disulphide bonds
D)  hydrophobic interactions
E)  hydrogen bonds between the R groupsF) A) and B)
G) A) and C)

Question 15

The tertiary structure of a protein is the

Accepted Answer

A)  bonding together of several polypeptide chains by weak bonds.
B)  order in which amino acids are joined in a polypeptide chain.
C)  unique three-dimensional shape of the fully folded polypeptide.
D)  organization of a polypeptide chain into an α helix or β pleated sheet.
E)  overall protein structure resulting from the aggregation of two or more polypeptide subunits.F) A) and E)
G) B) and E)

Question 16

Refer to the following figure to answer the questions below.
 
-Which bond is closest to the amino terminus of the molecule?

Accepted Answer

A)  A
B)  B
C)  C
D)  D
E)  EF) B) and E)
G) None of the above

Question 17

The following questions are based on the 15 molecules illustrated in the figure below.Each molecule may be used once,more than once,or not at all.
 
-Which of the following molecules contains a glycosidic linkage type of covalent bond?

Accepted Answer

A)  4
B)  6
C)  12
D)  13
E)  15F) A) and D)
G) C) and E)

Question 18

Which of the following is an example of hydrolysis?

Accepted Answer

A)  the reaction of two monosaccharides, forming a disaccharide with the release of water
B)  the synthesis of two amino acids, forming a peptide with the release of water
C)  the reaction of a fat, forming glycerol and fatty acids with the release of water
D)  the reaction of a fat, forming glycerol and fatty acids with the consumption of water
E)  the synthesis of a nucleotide from a phosphate, a pentose sugar, and a nitrogenous base with the production of a molecule of waterF) D) and E)
G) A) and B)

Question 19

The bonding of two amino acid molecules to form a larger molecule requires which of the following?

Accepted Answer

A)  removal of a water molecule
B)  addition of a water molecule
C)  formation of a glycosidic bond
D)  formation of a hydrogen bond
E)  both removal of a water molecule and formation of a hydrogen bondF) B) and C)
G) None of the above

Question 20

Changing a single amino acid in a protein consisting of 325 amino acids would

Accepted Answer

A)  alter the primary structure of the protein, but not its tertiary structure or function.
B)  cause the tertiary structure of the protein to unfold.
C)  always alter the biological activity or function of the protein.
D)  always alter the primary structure of the protein and disrupt its biological activity.
E)  always alter the primary structure of the protein, sometimes alter the tertiary structure of the protein, and affect its biological activity.F) B) and E)
G) B) and C)

Exam 5: The Structure and Function of Large Biological Molecules

The following questions are based on the 15 molecules illustrated in the figure below.Each molecule may be used once,more than once,or not at all. -Which of the following combinations could be linked together to form a nucleotide?

Correct AnswerverifiedShow Answer

The bonding of two amino acid molecules to form a larger molecule requires which of the following?

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Changing a single amino acid in a protein consisting of 325 amino acids would

Correct AnswerverifiedShow Answer

The following questions are based on the 15 molecules illustrated in the figure below.Each molecule may be used once,more than once,or not at all. -Which of the following molecules contains a glycosidic linkage type of covalent bond?

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A glycosidic linkage is analogous to which of the following in proteins?

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Which of the following statements best summarizes the differences between DNA and RNA?

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Which of the following is an example of hydrolysis?

Correct AnswerverifiedShow Answer

Refer to the following figure to answer the questions below. -Which bond is closest to the amino terminus of the molecule?

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What maintains the secondary structure of a protein?

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The following questions are based on the 15 molecules illustrated in the figure below.Each molecule may be used once,more than once,or not at all. -Which of the following molecules is a purine type of nitrogenous base?

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The genome of humans and chimpanzees are ________ identical.

Correct AnswerverifiedShow Answer

What type of covalent bond between amino acid side chains (R groups) functions in maintaining a polypeptide's specific three-dimensional shape?

Correct AnswerverifiedShow Answer

What is the term used for a protein molecule that assists in the proper folding of other proteins?

Correct AnswerverifiedShow Answer

Which of the following is not a polymer?

Correct AnswerverifiedShow Answer

What is the difference between an aldose sugar and a ketose sugar?

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Humans and mice differ because of which of the following?

Correct AnswerverifiedShow Answer

The tertiary structure of a protein is the

Correct AnswerverifiedShow Answer

The bonding of two amino acid molecules to form a larger molecule requires

Correct AnswerverifiedShow Answer

Use the following information to answer the questions below. You have just had a breakfast of toast (high-fibre bread) with butter and jam (no added sugar) along with a glass of milk. -Which of the following categories includes all others in the list?

Correct AnswerverifiedShow Answer

The basis for diversity,both within a species and among species,is a result of the

Correct AnswerverifiedShow Answer

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