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AQA JAN 2013 Biology Unit 4 unofficial mark scheme

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    Hi guys, just wondering if anyone would like to share what they got for different questions, we can all compare I'll start off with question 1 with what i can remember from it1a) Nitrification 1b) Denitrification 1bi) Nitrogen gas is converted to ammonium ions, ammonium ions then oxidised to nitrate ions which are used by the plants to manufacture proteinsAny contributions will be helpful for all
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    Anyone got the paper?
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    any one got the unofficial markscheme?
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Updated: February 24, 2013
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