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eutrophication is whereby excess feriliser from farmland has run off into areas of water such as lakes or rivers. algae growth is promoted due to the rise in phosphates. in turn  the remaining oxygen in t...

DNA is unzipped by a helicase, the gene to be encoded is transcribed to mRNA by the enzyme RNA polymerase, in mRNA the thymine base is substituted by uracil. The mRNA leave the nucleus via a nuclear pore ...

Synaptic transmission, whether chemical or electrical, results in a change in membrane potential of the post-synaptic cell. If an excitatory synapse is activated, this results in a depolarization of the p...

The Dna molecule is an antiparallel double helix made up of a sugar, a phosphate group and different bases pared with each other. These basis are Adenine (A), Guanine (G), Cytosine (C) and Thymine (T) and...

The four chambers of the heart are the upper two atria (atrium for singular) and the lower two ventricles. The atria first receive the blood, which is then pumped to its destination via the ventricles. Th...