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Vaccines are designed so that they contain antigens - for example viral antigens from the virus we wish to protect against. When these are injected they are recognised as foreign by white blood cells call...
Equation: carbon dioxide + water ---(with light energy)---> glucose + oxygen Glucose is the important product of the photosynthesis reaction. Some of the glucose is used in respiration to provide energ...
Crossing over is a process that happens during meiosis and results in genetic variation in gametes. It happens between prophase and metaphase. Pairs of homologous chromosomes lined up next to each other t...
Both processes operate on the same basic principle; passing electrons down a chain in order to create a proton (H+) gradient, allowing the formation of...
Sickle cell anaemia is caused by a point mutation, exchanging adenine for thymine in the DNA codon CTC. This causes a change in the mRNA to GUG, which results in a change in the polypeptide sequence durin...
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