(a(i))[1]
What is the $\text{R--S--S--R}$ group called in proteins?
(a(ii))[1]
Which level of protein structure is altered by reaction 1?
(a(iii))[1]
Why does this affect the activity of an enzyme?
(b(i))[1]
What kind of behaviour is the $-\text{COOH}$ group displaying in reaction 2?
(b(ii))[3]
Which interactions between R groups are affected by reaction 2? Explain your answer.
(c(i))[1]
How many oxygen atoms can one haemoglobin molecule transport?
(c(ii))[1]
What kind of bond is likely to hold the oxygen molecule to the iron atom in haem?
(c(iii))[1]
What is the bonding geometry around the iron atom?