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Outline the main differences between prokaryotic cells and eukaryotic cells.

Prokaryotic cells are much smaller than eukaryotic cells.Prokaryotic cells have no nucleusDNA in prokaryotic cells are not associated with proteins whereas DNA in eukaryotic cells are assoicated with histone...
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Answered by Ka L. • Biology tutor
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Explain the process that occurs from when the action potential reaches the pre-synaptic knob to transmission in the next neurone. (6 Marks)

Once an action potential reaches the synaptic cleft of a pre-synaptic neuron, voltage-gated calcium channels open. It is the depolarisation of the membrane that causes the opening. Calcium ions subsequently ...
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Answered by Basel E. • Biology tutor
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Name 3 differences between a plant cell and an animal cell.

A plant cell contains the following which an animal cell does not :ChloroplastsPermanent vacuole filled with sapCellulose cell wall Animal and plant cells both contain (so cannot be any of the following):Nuc...
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Answered by Kieran G. • Biology tutor
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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
4397 Views

Outline the differences between arteries and veins? (6) marks- 3 for each

Arteries and veins are the "tubes" that carry blood around the body.Artieries have thick outer walls in order to cope with the blood passing through being under such high pressure generated by the ...
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Answered by Amber F. • Biology tutor
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