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Haemoglobin is a protein consisting of four haem groups contained in four polypeptide chains. The loading of oxygen consists of oxygen binding to iron in the haem group at areas of higher oxygen concentra...
DNA has a number of important features that allow semi-conservative replication to take place. These include:1. DNA bases are held together by weak hydrogen bonds between bases that can be easily broken, ...
In resting axons, the inside of the cell is more negative than the outside of the cell. This potential difference has a value of -60 to -70mV and is very important in the transmission of impulses. This po...
Transcription is the process of using DNA from the nucleus of a cell as a template to synthesise mRNA (messenger RNA). An enzyme called DNA helicase unwinds and u...
The function of coronary arteries is to carry oxygenated blood to the myocardium (heart muscle).
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