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DNA helicase acts to unwind the 2 strands of DNA by breaking the Hydrogen bonds between them. This means that free nucleotide bases can be attracted and bind to the exposed bases.

First and foremost, answer the question in the introduction. There is a specific focus on 'extent', 'Tony Blair', 'succeed' and 'remaking'. Question how success and remaking was interpreted in thos...

Such compounds have high boiling points because bonds between the atoms are strong. The boiling point largely depends on electronegativity difference between the atoms - as this difference is greater, so ...

Carbon has 4 electrons in its outer shell, so to fill its outer shell (which can hold up to 8 electrons) and be stable, it wants another 4 electrons. It can do this by sharing its 4 electrons in 4 strong ...

First, it is key to remember that revision and exam preparation does not have to be reserved for the last few months before the exam. Revision notes work best when they are continuously consolidated throu...