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Polymerase Chain Reaction is an in vitro method used to amplify DNA fragments. It consists of three main steps, which are: (1) denaturing, (2) annealing, (3) and extension. During denaturation, ...

The heartbeat is started at a specialised area of the right atrium, known as the sinoatrial node (SAN); the SAN sends out the waves of depolarisation, resulting in contraction of the card...

A human cell is made up of:Cell Membrane: provides structure for the cell and controls what goes in and outCytoplasm: Jelly like liquid which contains the organellesNucleus: Contains DNAMitochondria: Make...

This is because when an organism dies there is no source of ATP, without this source of ATP ant myosin heads attached to the actin binding site cannot detach therefore leaving the muscles in a contracted ...

A population of organisms exists with a set range of alleles. In an organism, a random mutation can result in the formation of a new allele. Some mutated alleles can be beneficial to an organism, and incr...