Question 1

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.F) A) and E)
G) C) and D)

Question 2

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.F) A) and D)
G) B) and D)

Question 3

Which one of these materials is a copolymer

Accepted Answer

A)   Styrene-butadiene
B)   polyvinyl chloride
C)   polypropylene
D)   poly-cis-isoprene
E)   polyethyleneF) All of the above
G) D) and E)

Question 4

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

Accepted Answer

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

Question 5

Which of these molecules is a product of the hydrolysis of DNA

Accepted Answer

A)   acetic acid
B)   glucose
C)   adenine
D)   ribose
E)   waterF) A) and C)
G) A) and E)

Question 6

Proteins occurring in the b-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.F) B) and D)
G) C) and D)

Question 7

Which of the following statements about the binding of oxygen to deoxyhemoglobin is correct

Accepted Answer

A)   The binding of oxygen to Fe2+ in the first heme pulls the iron ion into the porphyrin ring, decreasing the affinity for the second oxygen.
B)   The binding of oxygen to Fe2+ in the first heme pushes the iron ion out of the porphyrin ring, decreasing the affinity for the second oxygen.
C)   The binding of oxygen to Fe2+ in the first heme pulls the iron ion into the porphyrin ring, increasing the affinity for the second oxygen.
D)   The binding of oxygen to Fe2+ in the first heme pushes the iron ion out of the porphyrin ring, increasing the affinity for the second oxygen.
E)   Oxygen does not bind to deoxyhemoglobin.F) A) and E)
G) D) and E)

Question 8

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

Accepted Answer

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

Question 9

The segment  represents the polymer named

Accepted Answer

A)   polybutylene.
B)   polyvinyl chloride..
C)   polypropylene.
D)   polystyrene.
E)   polyethyleneF) C) and E)
G) A) and E)

Question 10

A protein that has been reversibly denatured has

Accepted Answer

A)   temporarily lost part or all of its secondary or tertiary structure.
B)   temporarily lost part or all of its primary structure.
C)   been genetically modified due to errors in the nucleotides in the parent DNA.
D)   temporarily lost its amino acid residues.
E)   temporarily lost the hydrogen bonding between nitrogenous bases.F) B) and E)
G) A) and B)

Question 11

The monomer used to prepare polyvinyl chloride (PVC) is CHCl=CHCl.

Accepted Answer

A) True 
 B)False

Question 12

Poly(vinyl chloride)  results from the polymerization of

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and E)
G) B) and E)

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

Which of the following polymers has a syndiotactic structure

Accepted Answer

A)   
B)   
C)   
D)   E) A) and C)
F) All of the above

Question 15

The reaction of the diamine and di-carboxylic acid shown below produces nylon polymer. The correct structure for the repeating unit of the nylon polymer follows the arrow.

Accepted Answer

A) True 
 B)False

Question 16

What type of polymer is represented by the following repeating segment

Accepted Answer

A)   polyamide
B)   polyester
C)   polyether
D)   polyolefin
E)   polyethyleneF) B) and D)
G) B) and E)

Question 17

Which one of these choices is the general structural formula of an amino acid

Accepted Answer

A)   2-NH2 
C)     
D)    " class="answers-bank-image d-inline" rel="preload" >
B)   R-CH2-NH2
C)   2-NH2 
C)     
D)    " class="answers-bank-image d-inline" rel="preload" >
D)   2-NH2 
C)     
D)    " class="answers-bank-image d-inline" rel="preload" >E) A) and C)
F) None of the above

Question 18

Amides are synthesized from two classes of organic compounds. Those two types of compounds are

Accepted Answer

A)   carboxylic acids and alkenes.
B)   amines and alcohols.
C)   alcohols and carboxylic acids.
D)   amines and carboxylic acids..
E)   alkenes and amines.F) A) and B)
G) All of the above

Question 19

The only true hydrocarbon polymer found in nature is

Accepted Answer

A)   rubber.
B)   nylon.
C)   Tyvek.
D)   polystyrene.
E)   neoprene.F) A) and D)
G) A) and E)

Question 20

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.F) B) and D)
G) None of the above

Exam 25: Synthetic and Natural Organic Polymers

Which of the following statements about the binding of oxygen to deoxyhemoglobin is correct

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The segment represents the polymer named

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A protein is

Correct AnswerverifiedShow Answer

The backbone of a strand of nucleic acid consists of

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Which of these molecules is a product of the hydrolysis of DNA

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

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A protein that has been reversibly denatured has

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Proteins occurring in the b-pleated sheet structure

Correct AnswerverifiedShow Answer

Amides are synthesized from two classes of organic compounds. Those two types of compounds are

Correct AnswerverifiedShow Answer

The reaction of the diamine and di-carboxylic acid shown below produces nylon polymer. The correct structure for the repeating unit of the nylon polymer follows the arrow.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The monomer used to prepare polyvinyl chloride (PVC) is CHCl=CHCl.

Correct AnswerverifiedShow Answer

What type of polymer is represented by the following repeating segment

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Which of the following polymers has a syndiotactic structure

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Which one of these materials is a copolymer

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Which one of these choices is the general structural formula of an amino acid

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The only true hydrocarbon polymer found in nature is

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Poly(vinyl chloride) results from the polymerization of

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