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How does the citric acid cycle work, and what is oxidative phosphorylation?

The citric acid cycle (AKA the TCA cycle, AKA the Krebs cycle) is an incredibly important set of chemical reactions which is at the centre of how all aerobic organisms function. It is also really complicated...
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Answered by Frederick H. • Biology tutor
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What is a randomised controlled trial?

Randomised controlled trials are the most important way that new medical therapies (drugs, devices, procedures and so on) are tested. ‘Controlled’ means that volunteers in the trial are split into groups. On...
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Answered by Frederick H. • Biology tutor
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What causes cancer?

There are lots of different types of cancer which affect different tissues in the body, and two cancers of the same type may not have the same causes. This makes cancer interesting, but also potentially conf...
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Answered by Frederick H. • Biology tutor
8890 Views

What is an allele?

In the nucleus of the cell, there are pairs of chromosomes which carry the same genes in the same places. 2) Alleles are different versions of these genes.3) For example, a person may have an allele for brow...
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Answered by Ella S. • Biology tutor
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Why do we vaccinate people - how does it work?

Vaccination is an important method used in healthcare to prevent people from getting certain diseases. Vaccines contain a dead or weakened ( attenuated) form of a pathogen, and the immune system responds to ...
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Answered by Ella S. • Biology tutor
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