Search over 10,000 free study notes

Viruses are some of the smallest known organisms, and can cause serious disease in humans.A virus consists of a fragment of genetic material inside a protective protein coat. For a virus to survive and re...

Anti-biotic resistance is a growing problem for humans now, exacerbated by the overuse and over reliance on anti-biotics. Bacteria colonies have genetic variation amongst the individuals which means they ...

A synapse is the fluid filled gap between the presynaptic neuron and postsynaptic neuron. 1) An electrical impulse travels along an axon of the presynaptic neuron. 2) When the impulse reaches the nerve-en...

Osmosis is the net movement of free water molecules from an area of high concentration to low concentration across a selectively permeable membrane. 

First of all a nucelotide is the monomer that makes up DNA. Millions of monomers are joined together to form the double helix of a DNA molecule. A nucleotide is made of a pentose sugar (in the case of DNA...