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Passé composé is a past tense used to describe a completed action. For example, I went to the cinema (Je suis allé(e) au cinéma).

Imperfect is also a past tense. This time it is used to t...

When a neurone is at rest, the outside of the neurone is more positive than the inside. This is due to the sodium-potassium pump which actively pumps 3 Na+ outside the cell, whilst at the same time pum...

Enzymes are biological catalysts that are formed from globular proteins.

Active site is the molecule surface space where the substrate binds and catalysi...

Interviews are a way for the medical school to get a better understanding of you.  Some medical schools such as Edinburgh don't interview at all, though the majority do.  The interview is not the be-al...

Deltas form where rivers transporting sediment enter a calmer body of water such as a lake or sea and there is a decrease in the energy of the system. The reduction in energy of the flow causes the sed...