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The Golgi Apparatus modifies proteins by adding molecules onto them for example; glucose to make glycoproteins. These proteins are then re-packaged into Golgi vesicles for transport to other organelles...

DNA is a very long molecule (one cell contains about 2 metres of DNA!), meaning its coiled structure around proteins called histones allows it to fit into the small space of the nucleus. It also ...

An action potential from the axon arrives at the presynaptic neuron, stimulating voltage-gated calcium (Ca²⁺) ion channels to open. This allows calcium ions to diffuse into the synaptic knob, c...