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The purpose of the cell membrane is to make the cell into a closed compartment that is separate from the extracellular (outside) environment. It also works as a selective barrier that can allow the import or...

The conclusion of your essay is where the question, and your argument, are directly addressed. As it takes place at the end of the essay many candidates will overlook the conclusion, leaving little time for ...

The group one metals all have one electron in their outer shell, so are "electron donors". The further down the group one goes, the higher the electron shell containing the lone electron. The resul...

Although personal statements can seem like an overwhelming task, they don't need to be! They are what it says on the tin - a short piece of writing that’s about your interest in the subject and your experien...

Speaking exams can be scary, because you are put on the spot to ask questions that, especially at A level, may take some thinking about even in your native tongue. It is inevitable that you may struggle for ...