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1) Dead/Inactive/Attenuated Microorganisms activate immune response

2) White blood cells produce antibodies

3) Antibodies kill microorganisms

4) This allows fo...

Enzymes are molecules in the body that break down specific substrates which can then be used for energy or stored. An enzyme contains an active site that is complementary in shape to the substrate bein...

People are immunised against pathogens through vaccination - usually an injection. 

A vaccine is comprised of dead, inactive or weakened...

An enzyme is a protein that act as a biologcal catalyst, meaning that they will activate a biological reaction. 

Enzymes are very specific and will work with a specific substrate. You can...

Red blood cells have a biconcave disk shape, meaning that it increases their surface area and allows for more rapid diffusion of oxygen into and out of the cell.

Red blood ...