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A molecule will exhibit optical isomerism if it contains a chiral centre/ an asymmetric carbon atom - in other words, if it contains a carbon atom wit...

Covalent compounds contain atoms that share electrons - for example, hydrogen chloride (HCl) share electrons (one from each atom), in order to achieve a full set of 8 electrons in their outer ...

a) Proteins, which are highly-folded poplypeptides, are broken down into shorter polypeptides, and then into amino acids, by protease enzymes.

b) Fats, or lipids, are broken down by enzym...

Enzymes are biological catalysts - they 'speed up' biological reactions - essentially increasing the rate at which they occur.

Pepsin is an enzyme that catalyses the digestion of proteins...

A synapse acts as a junction between cells - either between neurons, or between a neuron and a muscle or gland cell.

Although neurons transmit information via electrical signals, synapses...