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Krebs cycle is a series of reactions that take place in the mitochondria of most living cells and result in the production of energy during aerobic respiration. During Krebs cycle oxygen is metabolised to pr...

Tropomyosin helps to regulate myofibril contraction. Before contraction, tropomyosin covers the myosin binding sites on the actin molecule, preventing the myosin heads from binding. During contraction, calci...

Sickle cell disease is caused by a recessive allele of the haemoglobin gene. When two copies are present (i.e. it is homozygous), many red blood cells become sickle-shaped, leading to disease. However, if on...

Everyone has their own ways of remembering things, but there are some good general points that might help you out. If you just read over things, you might find that you can’t remember much at the end of a se...

Allopatric speciation: New species appear when one interbreeding population is split into two reproductively isolated populations, which then evolve to become separate species. This mostly happens when popul...