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Each carbon atom forms covalent bonds with three other carbon atoms and one electron from each carbon atom is delocalised.It is these delocalised electrons which allow electricity to be conducted as they can...

Binding the first oxygen molecule leads to a change in the tertiary structure of haemoglobin This uncovers the second haem binding site for another oxygen molecule to attach

As you go along a period, there is an increasing number of protons in the nucleus of each atom meaning that the nucleus has an increasing positive charge.This means that the electrons are puller closer to th...

You gently heat the mixture and add 2-3 drops of Benedict's solution.If glucose is present, the solution will turn from blue to orange.

When the action potential reaches the presynaptic knob , it causes calcium ion protein channels to open and calcium ions enter the presynaptic knob by facilitated diffusion .The increased concentration of th...