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Firstly, although fetal haemoglobin is better at binding oxygen, it is also worse at giving up oxygen to the tissues which need it. Secondly, if adults had haemoglobin with the same affinity for oxygen as...

Extracurricular activities directly related to your subject e.g. a summer project, a CREST award or work experience, are a great thing to talk about in an Oxbridge personal statement! However, it is unnec...

Abortion is where the foetus/embryo is removed from the womb before it is able to survive independently. It raises ethical questions because it makes us consider when life begins and whether...

The first stage in viral replication occurs when a virus attaches to the surface of a host cell. The viral nucleic acid (VNA) then enters the cell. The VNA then takes over the cell, altering the metabolis...

One of the things that you need to remember about Biology A Level is that you have to memorise the key points of the mark scheme. Something that I consistently struggled with when I was doing past papers ...