A2 1

Question 1

Amino acid

Answer 1

Have the general formula RCH(NH2)COOH

Question 2

Zwitterion

Answer 2

The dipolar ionic form of an amino acid, formed when a proton is transferred from the acid group, to the basic amine group

Question 3

Isoelectric point

Answer 3

PH value at which an amino acid exists as a swifter ion

Question 4

Stereoisomers

Answer 4

Same molecular and structural formula, but have the atoms arranged differently in space

Question 5

Chiral carbon

Answer 5

Carbon atom with four different atoms or groups attached

Question 6

Addition polymerisation

Answer 6

When many small molecules join together to form a large molecule, with the breaking of a pi bond

Question 7

Condensation polymerisation

Answer 7

When two monomers join together to form a larger molecule, with the elimination of a small molecule eg.HCl or H2O

Question 8

Biodegradable

Answer 8

Breaks down completely into CO2 and H2O

Question 9

Degradable

Answer 9

Breaks down into smaller fragments, when exposed to heat or light

Question 10

Photodegradable

Answer 10

Becomes weak and brittle when exposed to sunlight for long periods of time

Question 11

Adsorption

Answer 11

A solid stationary phase holds molecules of gas, liquid or solute as a thin film on its surface

Question 12

Relative solubility

Answer 12

Movement of molecules between two different liquids due to a differing solubility between the molecules

Question 13

Retention time

Answer 13

The time, from the injection of the sample, for the component to lesbe the column

Question 14

Primary Amine

Answer 14

Has the general formula r-NH2