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What is the difference between Tumour supressor genes and Oncogenes?

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 cause...
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Answered by Ella W. • Biology tutor
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What is allopatric speciation?

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 two ...
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Answered by Isabella P. • Biology tutor
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how is an ation potential generated?

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 of t...
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Answered by Alexander L. • Biology tutor
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How do neurotransmitters transmit action potentials across synapses?

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 stimulates voltage-ga...
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Answered by Trishnaah S. • Biology tutor
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Explain why a mutation in the viral RNA leads to a change in the 3D shape of the protein antigens (3 marks)

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, s...
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Answered by Virad K. • Biology tutor
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