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The mitochondria is an organelle in the cell which is used as a "power station" to provide the cell with energy in the form of ATP. It uses substrates like glucose, which is broken down in the c...

Questions about speciation are at their core based on Darwin's theory of evolution. As a result, we must recall GCSE knowledge of natural selection to combine with the new concepts in speciation introduce...

First figure out the phenotype (what is visible/expressed) of parents: Normal male x Normal female Next write down their gametes: X^H y and X^H X^...

DNA helicase acts to unwind the 2 strands of DNA by breaking the Hydrogen bonds between them. This means that free nucleotide bases can be attracted and bind to the exposed bases.

action potential depolarises the synaptic terminal this activates the voltage gated calcium channels Calcium ions diffuses into the cell down the electrical gradient Calcium ions stimulate the release of ...