Question 1

When L-lysine (R = −(CH2)4NH2)is reacted with a large excess of strong base,which of the following ions is the predominant species in solution?

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 2

Which of the following structures is the best representation for the amino acid alanine under physiological conditions?

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 3

Which type of molecule attaches itself to a ribosome,where it serves as a pattern for protein biosynthesis?

Accepted Answer

A) transfer RNA 
B) protein 
C) DNA 
D) ribosomal RNA 
E) messenger RNA

Question 4

What is the charge on each phosphate group in DNA in an aqueous solution near physiological pH?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) −1 
E) −2

Question 5

Which of the following amino acids has a hydrophobic side chain?

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 6

What is the functional group corresponding to a peptide bond?

Accepted Answer

A) amine 
B) ether 
C) amide 
D) hemiacetal 
E) carboxylic acid

Question 7

Which of the following statements is correct?

Accepted Answer

A) Fibrous proteins tend to form long,water-soluble fibers,while globular proteins tend to form compact,water-soluble shapes. 
B) Fibrous proteins tend to form long,water-insoluble fibers,while globular proteins tend to form compact,water-soluble shapes. 
C) Fibrous proteins tend to form long,water-insoluble fibers,while globular proteins tend to form compact,water-insoluble shapes. 
D) Both fibrous proteins and globular proteins tend to form water-soluble structures of about the same shape. 
E) Fibrous proteins tend to form long,water-soluble fibers,while globular proteins tend to form compact,water-insoluble shapes.

Question 8

The side chain on the amino acid phenylalanine  is classified as

Accepted Answer

A) polar. 
B) asymmetric. 
C) hydrophilic. 
D) nonpolar. 
E) chiral.

Question 9

The polymer  is formed by addition of which of the following?

Accepted Answer

A) CH3CH2CH3 
B) CH2 = CH - CH3 
C) CH3CH = C(CH3)2 
D) H2C = CH - CH - CH2 
E) CH3 - CH = CH - CH3

Question 10

The amino acid L-lysine has the amine side chain R = −(CH2)4NH2.At low pH,all ionizable groups are protonated.What is the net charge on this fully protonated form of L-lysine?

Accepted Answer

A) 2 
B) 1 
C) −1 
D) −2 
E) 0

Question 11

Where in the cell does protein synthesis cell take place?

Accepted Answer

A) ribosome 
B) nucleus 
C) gene 
D) chromosome 
E) codon

Question 12

Which of the following combinations can produce a condensation polymer? (R and R' are alkyl groups)

Accepted Answer

A) R−OH + HOOC−R'−COOH 
B) HO−R−OH + R'−COOH 
C) H2N−R−NH2 + HOOC−R'−COOH 
D) A and C 
E) A,B,and C

Question 13

A compound used to make a polymer and from which the polymer's unit arises is called a _____.

Accepted Answer

A) ​amine 
B) ​monomer 
C) ​amide 
D) ​hydroxide 
E) ​alkane

Question 14

A(n)_____ is a chemical species of very high molecular weight made up from many units of low molecular weight covalently linked together.

Accepted Answer

A) ​polymer 
B) ​amine 
C) ​monomer 
D) ​hydroxide 
E) ​alkane

Question 15

The overall shape of a protein is maintained by

Accepted Answer

A) hydrogen bonding. 
B) ionic bonds. 
C) dipole-dipole bonding. 
D) covalent bonds. 
E) all of these

Question 16

In an electrically conducting polymer,what is a "hole"?

Accepted Answer

A) It is a region of negative charge. 
B) It is a delocalized π electron. 
C) It is an antibonding π molecular orbital. 
D) It is a π molecular orbital from which a π electron has been abstracted. 
E) It is an ion,such as I3-,added to increase the conductivity of the polymer.

Question 17

The polymer formed from ethylene glycol (HOCH2CH2OH)and1,3-propanedicarboxylic acid (HOOCCH2COOH)is what type of polymer?
I.addition polymer
II.condensation polymer
III.homopolymer
IV.copolymer

Accepted Answer

A) II and IV 
B) II and III 
C) I and IV 
D) I and III 
E) None of these; it's a polyamide.

Question 18

What are the building blocks of nucleic acids?

Accepted Answer

A) proteins 
B) monosaccharides 
C) lipids 
D) nucleotides 
E) amino acids

Question 19

Which of the following pairs of substances could form a polyester?

Accepted Answer

A) H2NCH2COOH + H2NCH2CH2COOH 
B) HO(CH2)4COOH + HOCH2CH=CHCH3 
C) HOCH2CH2OH + HOOCCOOH 
D) H2C=CHCH3 + HOCH2CH2COOH 
E) H2C=CHCN + H2C=CHCH3

Question 20

Which of the following is an amino acid?

Accepted Answer

A)   
B)   
C)   
D)   
E)

Exam 24: Polymer Materials: Synthetic and Biological

When L-lysine (R = −(CH₂) ₄NH₂) is reacted with a large excess of strong base,which of the following ions is the predominant species in solution?

Which of the following structures is the best representation for the amino acid alanine under physiological conditions?

Which type of molecule attaches itself to a ribosome,where it serves as a pattern for protein biosynthesis?

What is the charge on each phosphate group in DNA in an aqueous solution near physiological pH?

Which of the following amino acids has a hydrophobic side chain?

What is the functional group corresponding to a peptide bond?

Which of the following statements is correct?

The side chain on the amino acid phenylalanine is classified as

The polymer is formed by addition of which of the following?

The amino acid L-lysine has the amine side chain R = −(CH₂) ₄NH₂.At low pH,all ionizable groups are protonated.What is the net charge on this fully protonated form of L-lysine?

Where in the cell does protein synthesis cell take place?

Which of the following combinations can produce a condensation polymer? (R and R' are alkyl groups)

A compound used to make a polymer and from which the polymer's unit arises is called a _____.

A(n) _____ is a chemical species of very high molecular weight made up from many units of low molecular weight covalently linked together.

The overall shape of a protein is maintained by

In an electrically conducting polymer,what is a "hole"?

The polymer formed from ethylene glycol (HOCH₂CH₂OH) and1,3-propanedicarboxylic acid (HOOCCH₂COOH) is what type of polymer? I.addition polymer II.condensation polymer III.homopolymer IV.copolymer

What are the building blocks of nucleic acids?

Which of the following pairs of substances could form a polyester?

Which of the following is an amino acid?

Exam 24: Polymer Materials: Synthetic and Biological

When L-lysine (R = −(CH2) 4NH2) is reacted with a large excess of strong base,which of the following ions is the predominant species in solution?

Which of the following structures is the best representation for the amino acid alanine under physiological conditions?

Which type of molecule attaches itself to a ribosome,where it serves as a pattern for protein biosynthesis?

What is the charge on each phosphate group in DNA in an aqueous solution near physiological pH?

Which of the following amino acids has a hydrophobic side chain?

What is the functional group corresponding to a peptide bond?

Which of the following statements is correct?

The side chain on the amino acid phenylalanine is classified as

The polymer is formed by addition of which of the following?

The amino acid L-lysine has the amine side chain R = −(CH2) 4NH2.At low pH,all ionizable groups are protonated.What is the net charge on this fully protonated form of L-lysine?

Where in the cell does protein synthesis cell take place?

Which of the following combinations can produce a condensation polymer? (R and R' are alkyl groups)

A compound used to make a polymer and from which the polymer's unit arises is called a _____.

A(n) _____ is a chemical species of very high molecular weight made up from many units of low molecular weight covalently linked together.

The overall shape of a protein is maintained by

In an electrically conducting polymer,what is a "hole"?

The polymer formed from ethylene glycol (HOCH2CH2OH) and1,3-propanedicarboxylic acid (HOOCCH2COOH) is what type of polymer? I.addition polymer II.condensation polymer III.homopolymer IV.copolymer

What are the building blocks of nucleic acids?

Which of the following pairs of substances could form a polyester?

Which of the following is an amino acid?

When L-lysine (R = −(CH₂) ₄NH₂) is reacted with a large excess of strong base,which of the following ions is the predominant species in solution?

The amino acid L-lysine has the amine side chain R = −(CH₂) ₄NH₂.At low pH,all ionizable groups are protonated.What is the net charge on this fully protonated form of L-lysine?

The polymer formed from ethylene glycol (HOCH₂CH₂OH) and1,3-propanedicarboxylic acid (HOOCCH₂COOH) is what type of polymer? I.addition polymer II.condensation polymer III.homopolymer IV.copolymer