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There are 2 sounds heard by a stethoscope, the so called 'lub dub'. The lub being the closing of the atrioventricular valves (i.e. the valves between the atria and the ventricles). This is caused by an in...
A cell surface membrane is made up of a type of molecules called phospholipids, so what is a phospholipid bilayer? The first step would be to break down the term. ‘Phosph...
Transcription takes place in the nucleus and is the first stage of protein synthesis. RNA polymerase attaches to the DNA double helix at the promoter sequence and unwinds the helix by breaking the hydroge...
DNA replicates by a semi-conservative method. When replication needs to occur, DNA helicase separates the two strands of DNA by breaking the hydrogen bonds between the strands. Each free strand now acts a...
a) Oestrogen or Progesterone b) FSH stimulates follicles in the ovaries to mature while progesterone has a "maintenance" function as it maintains the lining of the uterus. Progesterone also has ...
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