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DNA normally exists in the cell as a double-stranded structure, comprising of two complementary strands that are held together by hydrogen bonds.

DNA replication involves two main steps. Firstly, t...

There are 4 main structural levels of proteins which allow them to be the most diverse molecules in the cell. First is the primary structure which is the sequence of amino acids found in the protein. Amin...

I have always had an interest for the subject and find it very interesting. I have achieved both GCSE and A-Level biology and am currently studying Biochemistry with Genetics at university. I understand t...

competitive inhibition occurs when the active site of the enzyme is complementary to the binding site of the inhibitor and so binds to form a complex. The inhibitor molecule therefore occupies the active ...

Once the action potential reaches the pre-synaptic bulb, the change in membrane potential triggers the opening of voltage-gated calcium channels to allow calcium to enter the cell. The influx of calcium t...