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Question 4 is the first instance in the paper where a student is required to use more than one source, and again the first question to concentrate in-depth on the effects of language.<...

concentration = moles / volume

must convert volume into litres 1 litre = 1000cm3 (divide by 1000)

c= n/v = 0.4/0.025 = 16mol/l

Ok, so complementary base pairing occurs within DNA -- cytosine and guanine, adenine and thymine. So if there is 30 bases of cytosine then there MUST be 30 bases of guanine which then equals 60. So to ...

To sketch a polynomial function (a polynomial is a function involving powers of x, for example y = x³ + 2x² - 13x + 10):

1. Start by differentiating the function to ...

Prepositions are little words that describe the location of something, or where it’s going, like for, to, in, on, over, under in English. In German, they change the case of the noun that follows them. ...