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As an A* biology student, I believe I can help show others the best way to revise for biology and receive the grade they want. Firstly, acquire a text book that you know contains all the information from ...

1. Arteries have a much narrower lumen (the middle bit of space) and a much thicker wall. This is due to the fact that arterial walls contain more muscle and elastic fibres, than those of veins. Reason...

Denaturalization breaks down all the structures but the primary one. Remember that the primary one is made up of the aminoacids. If we break the peptide bond between aminoacids we're changing the protein,...

-DNA is double stranded, while RNA is single stranded -DNA has the bases ATCG, while RNA has AUCG -DNA has the sugar base Deoxyribose, RNA has Ribose -DNA forms a double helix, RNA does not form a double ...

As an action potential arrives at the presynaptic knob, the membrane is depolarised. This causes calcium channels in the membrane to open and calcium ions to flood in. This influx of calcium causes vesicl...