(a(i))[1]
State the kind of chemical reaction that is used to make these polymer chains.
(a(ii))[2]
Serine and valine are able to join to make a dipeptide. Draw the skeletal formula of the dipeptide ‘val-ser’.
(a(iii))[2]
Suggest how the amino acid type in a protein determines its three-dimensional structure.
(b(i))[2]
Using labelled diagrams or words as appropriate, explain why one enzyme may catalyse only a particular reaction on a particular substrate.
(b(ii))[3]
Using labelled diagrams or words as appropriate, explain how non-competitive inhibition of an enzyme-catalysed reaction can take place.