carbon, hydrogen, nitrogen, oxygen

  • These elements make up units called amino acids and is joint together by peptide links.
Amino acids and peptide links
  • Protein helps in the growth and repair of body cells.
  • It produces antibodies and hormones and enzymes.
  • Nitrogen is the main element that is responsible for growth.

Protein can be found in Animal protein (HBV) and Plant protein (LBV).


          Animal                  Plant

  • meat.                      beans
  • Eggs.                      nuts
  • Milk.                       peas
  • Fish.                       Seeds
  1. Advantages of plant protein is that there is less fat in them.
  2. It contains more cellulose
  3. It is cheaper to buy
  4. It is more ethical.