Organic Materials Structure and Function

Question 1

a-glucose polymerises to form which branched glucose polymer?

Answer 1

Amylopectin

Question 2

a-glucose polymerises to form which unbranched glucose polymer?

Answer 2

Amylose

Question 3

Give an example of a copolymer

Answer 3

polyester

Question 4

These are formed where adjacent polypeptides intereact through H bonding between the peptide bonds

Answer 4

B-pleated sheets

Question 4

Hard water contains high levels of “______”

Answer 4

Metals ions such as Ca2+, Fe2+, Mg2+

Question 5

In relation to water solubility, what is the name given to the carbon chain of a soap molecule?

Answer 5

Hydrophobic

Question 6

In relation to water solubility, what is the name given to the ionic end of a soap molecule?

Answer 6

Hydrophilic

Question 7

B-Glucose polymerises to form which unbranched and insoluble polymer?

Answer 7

Cellulose

Question 7

Interactions between side chains of amino acids in a polypeptide chain can be of four forms. Name three.

Answer 7

Ionic bonds, Disulfide bonds, hydrophobic interactions/dispersion forces, hydrophilic interactions/H-bonding

Question 7

The coiled spring structure where the side chains extend beyond the helix itself is known as …?

Answer 7

a-helix

Question 8

The monomer of polylactic acid is?

Answer 8

Lactic acid

Question 9

Provide an advantage of natural polymers over synthetic polymers

Answer 9

Natural polymers are biodegradable due to reversibility of condensation reaction

Question 10

The monomer tetrafluoroethene forms which polymer used for coating frypans.

Answer 10

Polytetraflurorethene (PTFE)

Question 11

The _______ structure considers the 3D arrangment of a protein.

Answer 11

Teriary

Question 12

The _______ structure considers the final, complete structure fo a protein.

Answer 12

Quarternary

Question 13

Name the amino acid without a chiral centre.

Answer 13

Glycine

Question 14

Name the atom that joins monosaccharides to form a glycosidic bond.

Answer 14

Oxygen

Question 15

The _______ structure of a protein is the local folding of a polypeptide.

Answer 15

Secondary

Question 16

Name the monomer of polyethylene.

Answer 16

Ethene

Question 17

The _______ structure of
a protein is the
sequence of amino
acids.

Answer 17

Primary

Question 18

Through which carbons do disaccharides form a glycosidic linkage?

Answer 18

1, 4

Question 19

What is the empirical formula of a monosaccharide?

Answer 19

CH2O

Question 20

Through which carbons does amylopectin form a glycosidic linkage?

Answer 20

1 & 4 and 1 & 6

Question 21

What is the name for a monomer of protein?

Answer 21

Amino acid

Question 22

Triglycerides consist of how many fatty acids?

Answer 22

3

Question 23

What is the name given to a polymer formed from two different monomers?

Answer 23

Copolymer

Question 24

Two major competing theories exist on the workings of enzymes, Name them.

Answer 24

Induced fit model, Lock and Key model

Question 25

What is the name given to the form of amino acids where a H+ has been released from the carboxyl group and accepted by the amino group?

Answer 25

Zwitterion

Question 26

What are the products in the reaction between triglycerides and sodium hydroxide?

Answer 26

Glycerol and soap molecules

Question 27

What is the significant difference between the induced fit model and the lock and key model of enzyme action?

Answer 27

The ability of the enzyme to flex

Question 28

What molecule is eliminated in condensation reactions?

Answer 28

Water

Question 29

What polymer property(s) does degree of crystallinity affect?

Answer 29

Hardness and Density

Question 30

Which polymer of polypropylene has the methyl groups on the same side?

Answer 30

isotactic polypropylene. iPP

Question 31

What type of intermolecular forces exist between chains of polypropene?

Answer 31

Dispersion forces

Question 32

Which polymer of polypropylene has the methyl groups randomly distributed along the chain?

Answer 32

atactic polypropylene. aPP

Question 33

Which structural form/s of polypropene have crystalline regions?

Answer 33

isotactic and syntactic

Question 33

Which polymer is joined by 1-4 and 1-6 glycosidic bonds between alpha glucose molecules?

Answer 33

Glycogen

Question 33

Which polymer of polypropylene has the methyl groups alternating along the chain?

Answer 33

syntactic polypropylene. sPP