Question 1

The backbone of a strand of nucleic acid consists of

Accepted Answer

A) phosphate units only. 
B) phosphate and sugar units. 
C) polyester. 
D) phosphate, sugar, and nitrogen base units. 
E) sugar units only. 
A) phosphate units only. 
B) phosphate and sugar units. 
C) polyester. 
D) phosphate, sugar, and nitrogen base units. 
E) sugar units only. B

Question 2

Hydrogen bonding, dispersion forces, ionic forces, and dipole-dipole forces all affect the structure of a protein?

Accepted Answer

A) True 
 B)False  True

Question 3

Cysteine and methionine are unique among the twenty essential amino acids in that they

Accepted Answer

A) are chiral. 
B) contain an aromatic ring. 
C) do not form dipolar ions. 
D) contain sulfur. 
E) cannot join with other amino acids to form peptides. 
A) are chiral. 
B) contain an aromatic ring. 
C) do not form dipolar ions. 
D) contain sulfur. 
E) cannot join with other amino acids to form peptides. D

Question 4

The segment   represents the polymer named

Accepted Answer

A) polybutylene. 
B) polyvinyl chloride. 
C) polypropylene. 
D) polystyrene. 
E) polyethylene. 
A) polybutylene. 
B) polyvinyl chloride. 
C) polypropylene. 
D) polystyrene. 
E) polyethylene.

Question 5

Proteins occurring in the $\beta$-pleated sheet structure

Accepted Answer

A) are relatively inelastic. 
B) never occur in nature. 
C) produce structurally weak materials. 
D) contain no peptide bonds. 
E) are not involved in hydrogen bonds. 
A) are relatively inelastic. 
B) never occur in nature. 
C) produce structurally weak materials. 
D) contain no peptide bonds. 
E) are not involved in hydrogen bonds.

Question 6

Phosphorus is an essential mineral element. It is an important atom in which one of the following?

Accepted Answer

A) amino acids 
B) proteins 
C) polyethylene 
D) nylon 
E) DNA 
A) amino acids 
B) proteins 
C) polyethylene 
D) nylon 
E) DNA

Question 7

The primary structure of a protein refers to the unique amino acid sequence of the polypeptide chain.

Accepted Answer

A) True 
 B)False

Question 8

The intermolecular force between bases on the opposite strands of DNA responsible for its double-helical structure is

Accepted Answer

A) hydrogen bonding. 
B) dispersion force. 
C) covalent bonding. 
D) ionic force. 
E) dipole-dipole force. 
A) hydrogen bonding. 
B) dispersion force. 
C) covalent bonding. 
D) ionic force. 
E) dipole-dipole force.

Question 9

Which choice contains all three molecular units found in nucleotides?

Accepted Answer

A) phosphate, sugar, amino acid 
B) amino acid, nitrogen-containing base, sugar 
C) carboxylic acid, sugar, protein 
D) phosphate, nitrogen-containing base, sugar 
E) sugar, amino acid, protein 
A) phosphate, sugar, amino acid 
B) amino acid, nitrogen-containing base, sugar 
C) carboxylic acid, sugar, protein 
D) phosphate, nitrogen-containing base, sugar 
E) sugar, amino acid, protein

Question 10

Which choice lists both the sugar and the nitrogen base that are a part of RNA but are not a part of DNA?

Accepted Answer

A) deoxyribose and thymine 
B) ribose and deoxyribose 
C) ribose and uracil 
D) uracil and thymine 
E) ribose and thymine 
A) deoxyribose and thymine 
B) ribose and deoxyribose 
C) ribose and uracil 
D) uracil and thymine 
E) ribose and thymine

Question 11

An essential amino acid is one that

Accepted Answer

A) must be included in the diet. 
B) contains no sulfur. 
C) occurs in all types of proteins. 
D) is necessary for vitamin production. 
E) the body can synthesize. 
A) must be included in the diet. 
B) contains no sulfur. 
C) occurs in all types of proteins. 
D) is necessary for vitamin production. 
E) the body can synthesize.

Question 12

The functional group   found in proteins is called a (an)

Accepted Answer

A) amide. 
B) carboxylic acid. 
C) amine. 
D) amino acid. 
E) dipeptide. 
A) amide. 
B) carboxylic acid. 
C) amine. 
D) amino acid. 
E) dipeptide.

Question 13

Which of the following polymers is formed by a condensation process?

Accepted Answer

A) PVC 
B) nylon 
C) Teflon 
D) Plexiglas 
E) neoprene 
A) PVC 
B) nylon 
C) Teflon 
D) Plexiglas 
E) neoprene

Question 14

Poly(vinyl chloride)results from the polymerization of

Accepted Answer

The answer of Poly(vinyl chloride)results from the polymerization of ...

Question 15

Acrylonitrile results from the polymerization of

Accepted Answer

The answer of Acrylonitrile results from the polymerization of ...

Question 16

The secondary structure of a protein is the

Accepted Answer

A) configuration of those parts of the chain stabilized by a regular pattern of covalent bonds between C and O groups of the backbone of the chain. 
B) configuration of those parts of the chain stabilized by a regular pattern of hydrogen bonds between CO and NH groups of the backbone of the chain. 
C) specific order of amino acids in the chain. 
D) overall three-dimensional structure of the molecule. 
E) overall arrangement of several polypeptide chains into one functional unit. 
A) configuration of those parts of the chain stabilized by a regular pattern of covalent bonds between C and O groups of the backbone of the chain. 
B) configuration of those parts of the chain stabilized by a regular pattern of hydrogen bonds between CO and NH groups of the backbone of the chain. 
C) specific order of amino acids in the chain. 
D) overall three-dimensional structure of the molecule. 
E) overall arrangement of several polypeptide chains into one functional unit.

Question 17

Which one of these materials is a copolymer?

Accepted Answer

A) Styrene-butadiene 
B) polyvinyl chloride 
C) polypropylene 
D) poly-cis-isoprene 
E) polyethylene 
A) Styrene-butadiene 
B) polyvinyl chloride 
C) polypropylene 
D) poly-cis-isoprene 
E) polyethylene

Question 18

The polymer formed from the monomer CH2=CH-CN is

Accepted Answer

A)    
B) (CH2=CHCN)n 
C) (CH2=CH=CN)n 
D)    
A)    
B) (CH2=CHCN)n 
C) (CH2=CH=CN)n 
D)

Question 19

Which of the structures below corresponds to the dipeptide cysteylananine? The parent amino acids are shown below.

Accepted Answer

The answer of Which of the structures below corresponds to...

Question 20

A protein is

Accepted Answer

A) a polysaccharide. 
B) a saturated ester of glycerol. 
C) one of the units making up a nucleic acid. 
D) a polymer of amino acids. 
E) an aromatic hydrocarbon. 
A) a polysaccharide. 
B) a saturated ester of glycerol. 
C) one of the units making up a nucleic acid. 
D) a polymer of amino acids. 
E) an aromatic hydrocarbon.

Exam 25: Synthetic and Natural Organic Polymers

The backbone of a strand of nucleic acid consists of

Hydrogen bonding, dispersion forces, ionic forces, and dipole-dipole forces all affect the structure of a protein?

Cysteine and methionine are unique among the twenty essential amino acids in that they

The segment represents the polymer named

Proteins occurring in the β\betaβ -pleated sheet structure

Phosphorus is an essential mineral element. It is an important atom in which one of the following?

The primary structure of a protein refers to the unique amino acid sequence of the polypeptide chain.

The intermolecular force between bases on the opposite strands of DNA responsible for its double-helical structure is

Which choice contains all three molecular units found in nucleotides?

Which choice lists both the sugar and the nitrogen base that are a part of RNA but are not a part of DNA?

An essential amino acid is one that

The functional group found in proteins is called a (an)

Which of the following polymers is formed by a condensation process?

Poly(vinyl chloride)results from the polymerization of

Acrylonitrile results from the polymerization of

The secondary structure of a protein is the

Which one of these materials is a copolymer?

The polymer formed from the monomer CH2=CH-CN is

Which of the structures below corresponds to the dipeptide cysteylananine? The parent amino acids are shown below.

A protein is

Chemistry: The Study of Change

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Mass Relationships in Chemical Reactions

Reactions in Aqueous Solution

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Quantum Theory and the Electronic Structure of Atoms

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Physical Properties of Solutions

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Nonmetallic Elements and Their Compounds

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Filters

Proteins occurring in the $\beta$ -pleated sheet structure

The polymer formed from the monomer CH₂=CH-CN is