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Imagine someone sprays a deodorant from across the room, eventually it will make its way over to where you are and you can smell it. Diffusion is the spreading out of particles resulting in a net movem...

p²+ 2pq + q²= 1 

It looks daunting at first but once you get the hang of them they can be easy marks in the exam....

There are a few key points you should remember. RNA has a ribose sugar instead of a deoxyribose sugar, RNA also has uracil instead of thymine, so uracil binds to adenine. The base pairings in RNA are G...

Carbohydrates, Fats, Protein, Fibre, Vitamins and Mineral ions.

A gap between neurones where the impulse is transmitted chemically and triggers a new impulse in the nest neurone.