Observation

Many candidates attempted this question and their performance was poor. In part (a) many candidates answered it wrongly, some listed vitamins A,B,D,E&K. In part (b) many candidates could not outline functions of fat correctly. In part (c) some candidates wrote importance of vitamin C instead of vitamin A.

The expected answers are as follow:

1. 1. Composition of fat.
   
   
   • carbon.
   
   
   • hydrogen.
   
   
   • oxygen .
   
   
   2. Functions of fat
   
   
   • provision of energy.
   
   
   • solvent for fat soluble vitamins;
   
   
   • component of cell membrane.
   
   
   • prevent loss of heat from the body/act as an insulator.
   
   
   • protect certain vital organs.
   
   

2. Functions of sodium
   
   
   • regulates fluid balance of the body.
   
   
   • transmission of impulses in nerve cells and muscles.
   
   
   • for cell membrane permeability.
   
   
   • maintain blood volume/blood circulation.
   
   
3. Importance of Vitamin A in Humans.
   
   
   • improves vision/prevent night blindness.
   
   
   • increases resistance to disease.
   
   
   • for cell growth/development.
   
   
   • maintains the skin.
   
   
   • maintains normal functioning of cells lining the throat.