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The DNA code is degenerate, which means that a single amino acid can be coded for by more than one sequence of three bases. Some mutations, including substitution, may result in the same amino acid being ...

This exercise is testing the difference between the relative pronouns qui and que. Qui is used on the subject of a sentence: that is, the thing or person doing the action. Who stole the ...

I find that revising for an A-Level language exam often takes you outside of the classroom and the resources of your teachers. Obviously it's important to do past exam questions, listening exercises, essa...

A good personal statement is one which explains clearly why you want to study your chosen subject. It should explore some of the topics within the subject that you find most interesting or that you want t...

This is a hypothetical, or si clause, specifically the third type: si + pluperfect + conditional perfect. If I had been listening to my sister - this is the pluperfect, a tense further in the pas...