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The Krebs cycle produces ATP by substrate level phosphorylation. The cycle is completed twice per glucose molecule. It also produces NADH which goes on to donate an electron to the electron transport chai...

• The alpha and beta cells monitor the concentration of glucose in the blood • The normal blood glucose concentration is 90mg of glucoses in every 100cm³ of blood • If the concentration rises or falls awa...

A nervous impulse is transmitted across the synapse from a pre-synaptic neurone to a post-synaptic neurone through the use of neurotransmitter diffusion. To explain this in more detail let’s take the exam...

The light-independent reaction (Calvin cycle) takes place in the absence of light. Firstly, CO2 combines with ribulose biphosphate (RuBP) to produce two molecules of glycerate-3-phosphate (GP). GP is redu...

Diffusion is the movement of particles from an area of high concentration to an area of low concentration (with the gradient). Once the concentration in each area is equal, the overall diffusion rate is 0...