(a)[2]
Fill in the table below by naming one metal in each case: - haemoglobin in oxygen transport - transmission of nerve impulses - enzyme cofactor
(b)[3]
Enzymes are a particular class of protein molecules that catalyse biochemical reactions. Explain briefly how an enzyme breaks down a substrate molecule.
(c(i))[1]
At which level of protein structure (primary, secondary, tertiary) do disulfide bonds form?
(c(ii))[1]
Use a functional group in cysteine to illustrate how disulfide bonds are formed.
(c(iii))[1]
What type of chemical reaction is shown here?
(d(i))[1]
Identify the two proton types that produce absorptions E and F.
(d(ii))[2]
State and explain how absorptions E and F are split.