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Outline the process which occurs when an action potential arrives at a synapse

A synapse is a gap between two neurons and it can be thought of in 3 parts: The presynaptic neuron - The neuron at the start of the synapse. The synaptic cleft - The gap between the two neurons The postsynap...
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Answered by Eloise S. • Biology tutor
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What are some of the non-specific, first-line immune defences in humans?

When we think of immune defences, our minds may immediately jump to white blood cells such as macrophages or T lymphocytes, however there are actually many mechanisms by which our bodies fight infection by p...
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Answered by Dawid A. • Biology tutor
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Describe the process of DNA replication.

The method in which DNA replicates is called semi-conservative replication. Firstly, DNA helicase catalyses the break down of the hydrogen bonds between the base pairs in the DNA molecule. This partially unw...
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Answered by Lily G. • Biology tutor
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Discuss the accuracy of the terms "one gene, one protein"; "one gene, one enzyme"; and "one gene, one polypeptide."

The phrase "one gene, one protein" is inaccurate, as shown by the example of haemoglobin: this protein contains prosthetic haem groups which are not made by the activity of any gene, therefore gene...
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Answered by Angus B. • Biology tutor
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Describe the steps in Eukaryotic cell division

Cell division is split into interphase which encompasses G1, S and G2 phase after which is mitosis which is also split into Prophase, Metaphase, Telophase and Anaphase (PMAT - Pilots Make Arrivals Timely) In...
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Answered by Krupa T. • Biology tutor
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