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There are four stages of mitosis:prophase, metaphase, anaphase and telophase. 1) ProphaseChromatin into chromoso...
Haemoglobin acts as the Oxygen transportation system for the body. It is comprised of 4 polypeptide chains (quaternary protein structure) and each chain has an attached haem group. Each haem group allows ...
Glycogen is a polysaccharide of alpha glucose, joined together by glycosidic bonds which provide a branched structure.
DNA replication involves many steps and enzymes. As DNA is a double stranded helix it must be untwisted so that it can be copied. Each strand from the parental DN...
Action potential reaches pre-synaptic knob.This stimulates voltage gated Ca2+ channels to open and Ca2+ to diffuse in.This causes vesicles containing ACh to bind to the pre-synaptic membrane and release A...
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