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AQA BIOL1 Biology Unit 1 Exam - 16th May 2011 watch

  • View Poll Results: Are you resitting this unit?
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    (Original post by SuperEagle)
    if the long questions are on immunity do you think it will be about t/b cells and phagocytes or do you think something else about immunity will come up
    Yeah probs B/T cells as that's never really come up.
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    Maybe not digestion though, as they've had a long question on it before - how is starch digested?

    I doubt they would just ask about the structure of it, as it's such a small part of the spec.
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    (Original post by liviaaa)
    Maybe not digestion though, as they've had a long question on it before - how is starch digested?

    I doubt they would just ask about the structure of it, as it's such a small part of the spec.
    Hey liviaa :L
    Remember talking to you
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    If the long quesiton is on immunity I hope it's about phagocytosis. Probably won't be though :getmecoat:
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    (Original post by EffKayy)
    Hey liviaa :L
    Remember talking to you
    Aha yup Feeling ready for Monday?
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    (Original post by liviaaa)
    Aha yup Feeling ready for Monday?
    Kinda!! \:
    You?
    I didn't think immunity would come up, and was sure something else would come up! Not too good on that |:
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    (Original post by EffKayy)
    Kinda!! \:
    You?
    I didn't think immunity would come up, and was sure something else would come up! Not too good on that |:
    Ermm ish, I'm going through all my notes today, then some past papers tomorrow. Hopefully then I'll feel better!

    I hope it doesn't too, I don't like the B/T cell thing. Phagocytosis would be alright though.
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    (Original post by liviaaa)
    Ermm ish, I'm going through all my notes today, then some past papers tomorrow. Hopefully then I'll feel better!

    I hope it doesn't too, I don't like the B/T cell thing. Phagocytosis would be alright though.
    I don't like the B/T cell thing too! aha! I hope they ask a lot about ultracentrifugation and why you use buffer solution etc!
    So nervous :'(
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    (Original post by EffKayy)
    I don't like the B/T cell thing too! aha! I hope they ask a lot about ultracentrifugation and why you use buffer solution etc!
    So nervous :'(
    Yeah that would be all right. I'm guessing they'll be a lot on enzymes/active sites - there always is!

    Is this your first time, or resit?
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    (Original post by liviaaa)
    Yeah that would be all right. I'm guessing they'll be a lot on enzymes/active sites - there always is!

    Is this your first time, or resit?
    Resit. Got a C first time round, mainly because of silly little mistakes and lack of specific terminology. Gonna take my time on each question now (I know it seems a bit obvious to not rush it but i kinda rushed it last time :L )
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    (Original post by EffKayy)
    Resit. Got a C first time round, mainly because of silly little mistakes and lack of specific terminology. Gonna take my time on each question now (I know it seems a bit obvious to not rush it but i kinda rushed it last time :L )
    Oh okay :/ Well hopefully you'll do better this time!

    Also has asthma ever come up yet?
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    My mistakes from Jan paper:

    *inability to describe the graph with figures. Make sure you include figures in descriptions from graphs people.
    *AQA need specific answers. For the question asking you to describe the lock and key mechanism: I wrote enzyme is complementary to the substrate, but the markscheme specifically wanted active site.
    *My own mistake - writing cancer takes a lot of time to be made, instead of develop (frustrating but i don't know why i wrote made?!?)
    *This year was the only paper with a 3 mark question regarding "Can you conclude that ......... caused ....." or something, and I wrote what was on the previous markschemes, e.g. correlation not causation, other factors etc. But this time there was actually a mark for saying positive correlation!
    *Read the graph properly. For the question about no change in mass or whatever, I wrote 0.34, thinking that the markscheme would allow 0.34-0.36, but you had to write 0.35, so i got 0 marks.
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    (Original post by liviaaa)
    Oh okay :/ Well hopefully you'll do better this time!

    Also has asthma ever come up yet?
    I think so .. once!
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    (Original post by liviaaa)
    Oh okay :/ Well hopefully you'll do better this time!

    Also has asthma ever come up yet?
    Yep, but it was only like 2 marks. I think it was why an asthma attack leads to less oxygen in the blood or something.
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    Most of the paper will probably be how science works anyway.
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    (Original post by EffKayy)
    I think so .. once!

    (Original post by oHellno)
    Yep, but it was only like 2 marks. I think it was why an asthma attack leads to less oxygen in the blood or something.
    Oh okay, so maybe that could come up. Then again the Jan paper had 2 long lung questions..
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    (Original post by Insanity514)
    Most of the paper will probably be how science works anyway.
    They're only allowed to give 8 marks of questions on HSW.
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    Expecting HSW questions on control groups, etc
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    What kind of questions would come up for digestion?
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    Can anyone add to my explantation of Phagocytosis:

    (from my textbook)
    1)Chemical products of the pathogen act as attractants, causing the phagocytes to move towards the pathogen
    2) Phagyocytes attach themselves to the surface of the pathogen
    3) They engulf it, forming a vesicle (phagosome)
    4) Lysosomes move towards it and fuse with it, hydrolysing the insoluble molecules to make it more soluble
    5) Soluble products from the break down of the pathogen are absorbed into the cytoplasm of the pathogen
 
 
 
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