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An enzyme is known as a biological catalyst. This is because they can speed up reactions by providing an alternative pathway, lowering the activation energy of the reaction. They are normally composed of a p...

Background knowledge DNA - carry the genetic code that determines characteristics of an organism Chromosomes - made from long DNA molecules, many genes all coiled up into a chromosome. A healthy person will ...

My top tip for remembering dates is, grab a family member (mums are least likely to say no) and talk them thorugh your history curriculum. If when you're teaching them, you find big gaps in your knowledge th...

Ultimately, in exam conditions you have to prioritise speed during the planning time, as usually you only have about 45 minutes to write each essay. Therefore, plans have to be simple and different buzzwords...

Firstly, this is a classic GCSE question that crops up time and again, so it's worth making sure that you can expand brackets blindfolded and with your arms tied behind your back before you walk into the exa...