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DNA is made up of 4 bases (Adenine, Thymine, Guanine, Cytosine)

Adenine, guanine = purine 'Pure AGony'

Thymine and cytosine  = pyramidines

Adenine pairs with thymine (2 Hydrogen bonds...

Simple diffusion, facilitated diffusion and active transport are three methods to transport various molecules across a membrane. Whilst similar in the overall effect, there are some major differences betw...

This is an example of a common process that must be known: Impulse reaches the synaptic bulb, causing calcium channels to open and calcium to enter. This causes synaptic vesicles to move towards the pre-s...

Venous blood enters the heart through the vena cava, it drains into the right atrium. The blood then flows through the tricuspid valve into the right ventricle. When the heart contracts the blood is eject...

Both aerobic and anaerobic respiration begin with glycolysis, which is the splitting of the 6 carbon glucose into 2, 3 carbon pyruvate molecules. This happens because glucose cannot be used directly by ce...