proteins

Question 1

what makes up proteins?

Answer 1

20 different amino acids

Question 2

what is the group that varies called?

Answer 2

R group

Question 3

draw an amino acid labelled

Answer 3

..

Question 4

what is a zwitteron?

Answer 4

when an amino acid is at PH7 - has a negative and positive charge

Question 5

what is it called when 2 amino acids join? how do they form?

Answer 5

di-peptide

condensation reaction - releases water

Question 6

how could you test for proteins?

Answer 6

add sodium hydroxide to your sample, add copper sulphate and mix positive - purple / pink
negative - blue

Question 7

define a primary structure

Answer 7

sequence of amino acids in a polypeptide chain

Question 8

define a secondary structure

Answer 8

folding of primary structure alpha and beta held by weak hydrogen bonds

Question 9

define a tertiary structure

Answer 9

highly folded secondary structure strong hydrogen ionic and disulphide bonds

Question 10

define a quaternary structure

Answer 10

two or more polypeptide chains joined eg insulin