proteins Flashcards
1
Q
what are proteins made up of
A
amino acids
2
Q
describe how the amino acids are joined together to form a dipeptide?
A
- condensation reaction
- water removed
- peptide bonds form between OH ( of carboxyl group) and H from amine group
3
Q
is a protein a monomer or a polymer?
A
proteins are polymers made up of the monomer amino acids
4
Q
what is the primary structure of a protein?
A
the order of amino acids in the polypeptide chain
MUST SAY ‘ORDER’
5
Q
what is the secondary structure of a protein?
A
1) the sequence of amino acids causes parts of protein molecule to bend into alpha helix or beta pleated sheets
2) hydrogen bonds hold the secondary structure together
6
Q
where do the hydrogen bonds form in proteins?
A
- between C=O groups of carboxyl group of one amino acid
- and the H in amine group of other amino acid
7
Q
what is the tertiary structure
A
- further folding to form unique 3D shape
- held in place by ionic, hydrogen and disulphide bonds
8
Q
what is the quaternary structure ?
A
protein made up of more than one polypeptide chain
