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Okay, so let's get back to basics. What is an enzyme? An enzyme is a biological catalyst that speeds up chemical reactions. How does it do this? All enzymes have active sites, which is where certain molec...
The resting membrane potential inside the neurone (-70mV) is negative relative the outside! This means that even though there are both Na+ ...
Active transport and diffusion.Glucose is transported by active transport, against the concentration gradient, from the gut into intestinal epithelial cells. Whereas glucose is transported by facili...
Translation is the conversion of the messenger RNA (mRNA) code into a protein. Cytoplasmic mRNA is bound by ribosomes (which are present in the cytoplasm or rough endoplasmic reticulum). Transfer RNA (tRN...
Action potentials are how nerve impulses travel along nerve cells/neurones. At rest a neurone has a membrane potential of -70mV which is maintained by the action of sodium potassium pumps in the plasma me...
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