With reference to specific examples, explain how and why diet should be related to the age and activity of an individual.

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2017). The mark or mark type is shown in brackets.

1. [4] (a) active + more energy; reference to carbohydrates / fats; child AW + growth; reference to protein / calcium / vitamin D; (post-pubertal AW) female + iron ; reference to menstrual loss of blood; old person + less growth / less active / no menstruation ; reference to reduced need for correct named nutrient ;
2. [6] (b) muscle + wall ; contracts/churn / mechanical digestion; acid; optimum AW pH ; enzyme; protease / pepsin ; protein(s); to amino acids / (poly)peptides ;