(a(i))[1]
Name the human organ that carries out metabolism of amino acids such as phenylalanine.
(a(ii))[3]
Explain how the shape of a PAH enzyme molecule helps phenylalanine to be metabolised.
(b(i))[2]
Describe what is meant by the term gene mutation.
(b(ii))[3]
Explain how a person with the condition should adjust their diet to lower the chance of brain damage.
(b(iii))[3]
Complete the genetic diagram to show the chance that two carriers will have offspring with the condition.