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Transcription is the making mRNA from DNA. Translation is using the mRNA to code for a protein.

The electrical activity is initiated by the pacemaker of the heart, the sino-atrial node at the top of the left atrium. This spreads across the atria before reaching the atrio-ventricular node. Here there...

A synapse is a small gap between neurones (nerve cells). Information is passed along the neurone as an electrical impulse, but to get from one neurone to the next, the information is converted into a chem...

The following answers this past exam question. Test your understanding by defining all the CAPITALISED words. Enzymes are GLOBULAR PROTEINS, which contain an active site to which the substrate binds. The ...

In respiration, as you know the electrons travel through the electron transport chain and provide the energy to pump Hydrogen ions across the inner membrane. Once they reach the end of the chain, where do...