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A mutation is a change in the DNA base sequence. This causes a change in the amino acid that is synthesised, and this could change the shape of the active site on an enzyme. The shape of the active site m...

Polymerase Chain Reaction or PCR is the process of amplifying a sample of DNA. The first stage of a PCR cycle is known as the denaturation phase. This occurs at a temperature of 95C and lasts for approxim...

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...

Rather than cells having receptors specific to viruses, cells have receptors specific to molecules it needs to acquire from outside the cell, such as glucose (needed for respiration). It is the viruses wh...

Anaerobic conditios are those in which oxigen is not present, or present in very low quantities. Processes which are anaerobic tend to be found in stationary waters, and inside our muscles for example.