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biology aqa (b) mod 5 environment watch

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    do u guys rekon that will go down as a hard paper so they reduce the grade boundaries? did u guys talk about mutation or receive allele for the insect question that caused some to be resistant to pesticide?

    and whats O2 used for in respiration?
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    So why in every single source about nitrogen fixation by bacteria nitrogen is converted into ammonia? It is all dodgy but it is just one mark so it does not realy metter.
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    I put down rececive allele for insect question. For 02 I write about it being a source of electrons and hydrogen acceptor.
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    (Original post by A.S.D)
    do u guys rekon that will go down as a hard paper so they reduce the grade boundaries?
    No. I don't think it was an overly hard paper.

    did u guys talk about mutation or receive allele for the insect question that caused some to be resistant to pesticide?
    I talked about a mutation altering the base sequence and thus causing a different amino acid sequence to be built up in translation, so a protein has different structure and thus different properties, making it resistant.

    and whats O2 used for in respiration?
    It's the final acceptor of H^{+} and e^{-} in the electron transfer chains of aerobic respiration.
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    i put aceptor of hydrogen but how is it a source of electrons?
    whats an A on that exam?
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    (Original post by belis)
    So why in every single source about nitrogen fixation by bacteria nitrogen is converted into ammonia? It is all dodgy but it is just one mark so it does not realy metter.
    But how do plants use ammonia to produce amino acid? :confused:
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    hey nice 1 i put that about mutation base sequence changes etc. is that correct? cos i thought the resesive alles thing was correct but decided to choose mutation because it said 1 gene didnt it?
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    (Original post by A.S.D)
    hey nice 1 i put that about mutation base sequence changes etc. is that correct? cos i thought the resesive alles thing was correct but decided to choose mutation because it said 1 gene didnt it?
    I'm fairly sure it's correct otherwise I wouldn't have written it. A recessive allele question could be an alternate explanation but they didn't mention that a resistant allele was already present and didn't ask about increases in resistance (they just asked how resistance could occur)
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    Did you people state that the part of the brain was the cerebral cortex and the areas were the visual association area and speech motor area?
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    what was the answer to collect plants randomly along line transect?
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    But how do plants use ammonia to produce amino acid?
    Amino acids contain NH2 croup so in theory it is easier to make them from ammonia then from nitrate.
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    hey sorry had a chem lesson. i really thought i knew it when i went into the exam aswell, hope mod 7 goes ok! ahhh xx
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    (Original post by belis)
    Amino acids contain NH2 croup so in theory it is easier to make them from ammonia then from nitrate.
    Sorry but the specification doesn't say that.
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    i wud say that that exam was the hardest out of all the past papers on their website!
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    i found it alright but thats a bad sign as when i dont struggle i do badly and as you can see from my AS grade, i suck at Biology. im guessing an E/U for that.
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    yeh agreedm it always happens as well! past papers are ok then the real exam is solid, grrr!! won't they use ammonia and break it down into H and N for nucleic acids, then base sequence etc etc xx
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    so it was a hard exam yea? compared to past papers it was i rekon.
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    yeh i think it was. it was the way the questions were worded!
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    (Original post by A.S.D)
    what was the answer to collect plants randomly along line transect?
    ermm i put that random co-ordinative number generation but i think thats completely rong!:|
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    Amino acids contain NH2 croup so in theory it is easier to make them from ammonia then from nitrate.


    Sorry but the specification doesn't say that.
    We know detailed structure of amino acid from Module so it is no secret for anybody that NH2 group is there. And if it is easier to convert or not that is purerly my assumption.
 
 
 
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