Question 1

Draw the structure of the polymer made from cyclopentene, whose structure is shown below.

Accepted Answer

The answer of Draw the structure of the polymer made...

Question 2

What is the linkage group and chemical formula for the following compound?

Accepted Answer

A)  amine, C6H12NO 
B)  amine, C6H13NO 
C)  carbonyl, C6H13NO 
D)  amide, C6H12NO 
E)  amide, C6H13NO 
A)  amine, C6H12NO 
B)  amine, C6H13NO 
C)  carbonyl, C6H13NO 
D)  amide, C6H12NO 
E)  amide, C6H13NO

Question 3

Proteins CANNOT be which of the following?

Accepted Answer

A)  metal storage centres 
B)  oxidation-reduction centres 
C)  n2 transporters 
D)  reaction catalysts 
E)  sources of energy 
A)  metal storage centres 
B)  oxidation-reduction centres 
C)  n2 transporters 
D)  reaction catalysts 
E)  sources of energy

Question 4

Draw primary and secondary structures of DNA and RNA.

Accepted Answer

The backbone of a nucleic acid

Question 5

Which of the following are likely to participate in a condensation polymerization reaction?

Accepted Answer

A)  ethylene glycol, HOCH2CH2OH 
B)  tetrafluorethylene, C2F4 
C)  propylene, C3H6 
D)  styrene, CH2CHC6H6 
E)  peroxide, HOOH 
A)  ethylene glycol, HOCH2CH2OH 
B)  tetrafluorethylene, C2F4 
C)  propylene, C3H6 
D)  styrene, CH2CHC6H6 
E)  peroxide, HOOH

Question 6

Draw the line structure of the tripeptide I-II-III.

Accepted Answer

The answer of Draw the line structure of the tripeptide...

Question 7

Butadiene, CH2=CH-CH=CH2 (line drawing below), forms polymers that are used in elastomers. Write the structure of polybutadiene (at least three units included) and explain why this polymer would be more elastic than polyethylene.

Accepted Answer

A section of a poly-butadiene molecule i

Question 8

High density polyethylene

Accepted Answer

A)  forms under conditions that produce branched chain CH2 groups. 
B)  forms from linear molecules which maximize dispersion forces between aligned polymer molecules. 
C)  forms from branched chained polymers which maximizes the dispersion forces as molecules fit together like puzzle pieces. 
D)  is an amorphous polymer that melts at relatively low temperature. 
E)  is flexible and ideal for making squeeze bottles. 
A)  forms under conditions that produce branched chain CH2 groups. 
B)  forms from linear molecules which maximize dispersion forces between aligned polymer molecules. 
C)  forms from branched chained polymers which maximizes the dispersion forces as molecules fit together like puzzle pieces. 
D)  is an amorphous polymer that melts at relatively low temperature. 
E)  is flexible and ideal for making squeeze bottles.

Question 9

Draw a representative molecule containing three carbons for each of the following.

Accepted Answer

The answer of Draw a representative molecule containing three carbons...

Question 10

Nylon rope, a polyamide fibre product, has a tendency to stretch when it becomes wet (during a rainstorm, for example). Why?

Accepted Answer

A)  The water molecules act like plasticizers. 
B)  The water leads to cooling of the rope. 
C)  The nylon polymer molecules degrade in the presence of water. 
D)  The water molecules disrupt the intramolecular H bonds. 
E)  Cross-linkages are dissolved in water. 
A)  The water molecules act like plasticizers. 
B)  The water leads to cooling of the rope. 
C)  The nylon polymer molecules degrade in the presence of water. 
D)  The water molecules disrupt the intramolecular H bonds. 
E)  Cross-linkages are dissolved in water.

Question 11

What are the primary structures of the tripeptides that can be made from the following amino acids: Pro, Pro, Trp?

Accepted Answer

Pro-Pro-Tr

Question 12

What bonds CANNOT be easily broken in the process of polymerization?

Accepted Answer

A)  C=C 
B)  C-C 
C)  C-OH 
D)  N-H 
E)  O-H 
A)  C=C 
B)  C-C 
C)  C-OH 
D)  N-H 
E)  O-H

Question 13

What chemical bonding would characterize how proteins form secondary structures like beta sheets?

Accepted Answer

A)  covalent bonding 
B)  thiol bonds (disulfide bridge) 
C)  ionic bonds 
D)  hydrogen bonding 
E)  dispersion forces 
A)  covalent bonding 
B)  thiol bonds (disulfide bridge) 
C)  ionic bonds 
D)  hydrogen bonding 
E)  dispersion forces

Question 14

Draw the four nucleotide nucleic acid with primary structure TTGC. Use the shorthand notation.

Accepted Answer

The answer of Draw the four nucleotide nucleic acid with...

Question 15

What chemical bonding would characterize how proteins are "locked" into tertiary structures?

Accepted Answer

A)  dipole bonding 
B)  thiol bonds (disulfide bridge) 
C)  amide bonds 
D)  hydrogen bonding 
E)  dispersion forces 
A)  dipole bonding 
B)  thiol bonds (disulfide bridge) 
C)  amide bonds 
D)  hydrogen bonding 
E)  dispersion forces

Question 16

Sketch the polymer formed from the condensation of the molecules below. Include at least two units of each in your sketch.

Accepted Answer

The answer of Sketch the polymer formed from the condensation...

Question 17

Dacron is a polyester with the following structure.   What is the structure of the monomer containing a phenyl group used to make this polymer?

Accepted Answer

The answer of Dacron is a polyester with the following...

Question 18

From what monomer is acrylonitrile made from if the polymer looks like:

Accepted Answer

The answer of From what monomer is acrylonitrile made from...

Question 19

Starch is

Accepted Answer

A)  a disaccharide formed from $\alpha$-glucose. 
B)  a disaccharide formed from $\beta$-glucose. 
C)  a polysaccharide formed from $\alpha$-glucose. 
D)  a polysaccharide formed from both $\alpha$-glucose and $\beta$-glucose. 
E)  a polysaccharide formed from the disaccharide amylase. 
A)  a disaccharide formed from $\alpha$-glucose. 
B)  a disaccharide formed from $\beta$-glucose. 
C)  a polysaccharide formed from $\alpha$-glucose. 
D)  a polysaccharide formed from both $\alpha$-glucose and $\beta$-glucose. 
E)  a polysaccharide formed from the disaccharide amylase.

Question 20

Which of the polymer types listed below is most suitable for recycling?

Accepted Answer

A)  thermoset 
B)  elastomer 
C)  urea-formaldehyde polymers 
D)  thermoplastics 
E)  vulcanized rubbers 
A)  thermoset 
B)  elastomer 
C)  urea-formaldehyde polymers 
D)  thermoplastics 
E)  vulcanized rubbers

Exam 18: Macromolecules

Draw the structure of the polymer made from cyclopentene, whose structure is shown below.

What is the linkage group and chemical formula for the following compound?

Proteins CANNOT be which of the following?

Draw primary and secondary structures of DNA and RNA.

Which of the following are likely to participate in a condensation polymerization reaction?

Draw the line structure of the tripeptide I-II-III.

Butadiene, CH2=CH-CH=CH2 (line drawing below), forms polymers that are used in elastomers. Write the structure of polybutadiene (at least three units included) and explain why this polymer would be more elastic than polyethylene.

High density polyethylene

Draw a representative molecule containing three carbons for each of the following.

Nylon rope, a polyamide fibre product, has a tendency to stretch when it becomes wet (during a rainstorm, for example). Why?

What are the primary structures of the tripeptides that can be made from the following amino acids: Pro, Pro, Trp?

What bonds CANNOT be easily broken in the process of polymerization?

What chemical bonding would characterize how proteins form secondary structures like beta sheets?

Draw the four nucleotide nucleic acid with primary structure TTGC. Use the shorthand notation.

What chemical bonding would characterize how proteins are "locked" into tertiary structures?

Sketch the polymer formed from the condensation of the molecules below. Include at least two units of each in your sketch.

Dacron is a polyester with the following structure. What is the structure of the monomer containing a phenyl group used to make this polymer?

From what monomer is acrylonitrile made from if the polymer looks like:

Starch is

Which of the polymer types listed below is most suitable for recycling?

Fundamental Concepts of Chemistry

The Behaviour of Gases

Energy and Its Conservation

Atoms and Light

Atomic Energies and Periodicity

Fundamentals of Chemical Bonding

Theories of Chemical Bonding

Effects of Intermolecular Forces

Properties of Solutions

Organic Chemistrystructure

Organic Chemistryreactions

Spontaneity of Chemical Processes

Kinetics: Mechanisms and Rates of Reactions

Principles of Chemical Equilibrium

Aqueous Acidbase Equilibria

Applications of Aqueous Equilibria

Electron Transfer Reactions

The Transition Metals

The Main Group Elements

Nuclear Chemistry and Radiochemistry

Filters

Butadiene, CH₂=CH-CH=CH₂(line drawing below), forms polymers that are used in elastomers. Write the structure of polybutadiene (at least three units included) and explain why this polymer would be more elastic than polyethylene.