3.3.13 Amino acids, proteins and DNA

Question 1

Condensation polymers characteristics

Answer 1

Made of 2 different monomers
The two different monomers each have two functional groups
Bothe functional groups react causing the long chain polymer
Polyester, polyamide and polypeptides are examples

Question 2

polyester

Answer 2

Condensation polymer
Ester linkages-COO-
Diols and dicarboxylic acids are used

Question 3

Terylene

Answer 3

A polyester
Condensation polymer
Benzene -1,4- dicarboxylic acids and ethane-1,2-diol

Question 4

Polyamides

Answer 4

Condensation polymer
Formed when a carboxylic acid and an amine react together
Diamino alkane and a dicarboxylic acid
Have a -CONH- leakage

Question 5

Nylon-6,6

Answer 5

Condensation polymer
Polyamide
Made from 1,6-diaminohexane and hexane-1-6-dicarboxylic acid

In lab works faster is diacid chloride is used instead of carboxylic acid - HCl is eliminated
Nylon-6,10 is made from 1,6-diaminohexane and decane-1,10-dicarboxylic acid
Different kinds on nylons have different properties

Question 6

kevlar

Answer 6

Condensation polymer
Polyamide
Made from benzene-1,4-d’amine and benzene-1,4-dicarboxylic acid

The rigid benzene rings gove kevlar completely different properties to nylon
Kevlars strength = due to rigid chains and the ability of the flat aromatic rings ro pack together - held by strong intermolecular forces - hydrogen bonds

Question 7

Polypeptides and protein

Answer 7

One monomer = amino acid / different types of amino acids
Amino acid = has an amine group and a carboxylic acid group
Is a condensation polymer = water removed

There are 20 different occurring amino acids