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Semi-conservative replication is the process of making two molecules of DNA from one DNA molecule, each containing one original DNA strand and one newly synthesised DNA strand. The original double helix i...
Evidence that the Y chromosome determines maleness can be proved through analysis of individuals with chromosomal abnormalities. For example, a female has XX and a male has XY, but an individual with an a...
The membrane of an axon consists of three main protein channels: the sodium/potassium pumps, voltage-gated sodium channels and voltage-gated potassium channels. These play a role in establishing the membr...
Depolarisation of plasma membrane opens voltage-gated calcium channels, allowing calcium ions to move into pre-synaptic bulb down the concentration gradientHigh intracellular calcium results in the mobili...
The cytoskeleton is an internal framework within the cell made up of two different protein fibres: microfilaments and microtubules. It has a number of different functions including: providing mechanical s...
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