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This answer is best supported with a whiteboardAll living things need nitrogen, but nitrogen gas is too unreactive for plants and animals to use directly. Bacteria's main role in the nitrogen cyc...

First, the DNA Helicase enzyme ‘unzips’ the two stranded DNA by breaking the hydrogen bonds present between the complimentary base pairs on the two opposing strands. Then this leaves two exposed strands, ...

Action potentials are depolarisations above the threshold level traveling along a neurone, communication often evolves the action potential being transmitted from one neurone to another, this is done via ...