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Tumour supressor genes (TSG) and oncogenes and the two main types of genes involved in cancer, however they are very different. TSG normally function to slow down cell division, repair DNA mistakes and ca...

When two populations of a species are isolated geographically (for example by a river, mountain, flood etc). The two populations adapt to different selection pressures and so then eventually evolve into t...

An action potential is generated within the axon of a neuron via a series of steps:1) the inside of the neuron at rest is negative (-70mV), called the resting potential2) Na ion channels open and inside o...

The process can be broken down into 3 main stages. 1 - An Action Potential triggers Calcium Influx: when the action potential arrives at the synaptic knob of the presynaptic neurone, it s...

A mutation in the viral RNA results in a change in the RNA base sequences. This can result in a change in the amino acid sequence during translation. This then changes the position of intramolecular bonds...