Search over 10,000 free study notes

Gas exchange is important for fish as they need oxygen for respiration. Considering Fick’s law, in order to maximise the rate of gas exchange, fish have many gill filaments covered in lamellae, maximising th...

A good starting point in this question is identifying what is meant by the ‘tertiary structure’ of a protein, which is the folding of the protein into its 3D structure/shape . Relate this ten to maltase – an...

This question is one of the core questions in biology that many thousands of biologists are trying to answer. Although we have made huge progress since DNA was discovered there is still a lot that isn't know...

Looking at a cholinergic synapse:The action potential arrives at the presynaptic knob. This causes voltage-gated calcium ion channels to open, and calcium ions to diffuse into the presynaptic knob.The influx...

The arrival of an action potential at the end of the presynaptic neurone causes Ca 2+ protein channels to open Ca 2+ ions diffuse into the synaptic knob by facilitated diffusionCa 2+ ions cause synaptic vesi...