PROTEIN

Name some food rich in protein; Milk, Cheese,Yogurt, Eggs, Bean, Pork Tenderloin, Soy, Lean Beef. We need protein for growth and repair.

Functions of proteins: 
  • structural- for example muscles.
  • Hormones- chemical messenger e.g oestrogen.
  • Antibodies- help destroy pathogens.
  • Enzymes- speed up reaction.

Protein is broken down into amino acid which are soluble and small enough to enter the blood vessels.
Structure of protein:
  • Proteins are macro molecules (polymer).
  • They contain lots of different amino acids (monomers). 
  • The long protein chain is then folded to make a 3D  structure with a specific shape.
  • This allow other molecules to fit into it - very important for antibodies and enzymes.


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