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    Okay so it's Edexcel 5 tomorrow :eek:
    I can't find my module 2+3 purple book anywhere so i'm having to use my regular A-level biology textbook which isn't nearly as specific and doesn't cover all of the Edexcel course even thought it's huge :p:

    I'm trying to check up on Unit 3 nitrogen cycle and named bacteria in the nitrogen cycle
    Unfort my textbook only names a few and my computer won't open the Edexcel spec - the plug in is muffed up

    So i remember Nitrosomonas as NH4 to NO2- and Nitrobacter as NO2- to NO3- and Rhizobium as N2 to NH4+
    (Correct me if i'm wrong!!)

    But could somebody tell me what the others are - i vaguely remember an Azobacter maybe... whether they're in the soil, which ones are symbiotic with the legumes and what they convert!!

    Thanks in advance guys
    Boo
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    Azobacter do the same as Rhizobium except they are found free in the soil

    Pseudomonas and Thilobactillus are denitrifying bacteria and convert NH4+ back into N2

    Good luck for tomorrow!
 
 
 
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