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Edexcel 6BIO7/01 (International Unit 3B) ~ 7th May 2013 ~ AS Biology Watch

  • View Poll Results: Which practical do you expect? ~Biology unit 3 May 7~
    Daphnia (effect of caffeine on heart beat rate)
    13.51%
    Test for vitamin C
    16.22%
    Membrane permeability (Beetroot)
    24.32%
    Enzyme concentration
    16.22%
    Mitosis (Onion root cell)
    75.68%
    Tissue culture
    10.81%
    Tensile strength of plant fibres
    10.81%
    Mineral deficiencies
    10.81%
    Antimicrobial properties of plants
    21.62%

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    (Original post by gimme those exams)
    Dont think so, that is way too low for 3B paper. Im guessing A will be 30-34 depending on how well everyone did.
    previous to the jan 2013 exam all the boundaries for an A were below 30. I was so surpirised when i saw the grade boundaries for this paper.
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    (Original post by Sweet Strawberry)
    Hey guys just to let u know the answer to the first question is c and the proof is in this diagram which is identical to the one in the paper but without the splits or the labels Attachment 214062
    The answer cannot be d since that is the root cap and the for the second part there are 4 cells undergoing mitosis and there are two marks available so a mark for every two labeled


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    ohh well, how did you get this picture?
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    (Original post by biologychemmaths)
    previous to the jan 2013 exam all the boundaries for an A were below 30. I was so surpirised when i saw the grade boundaries for this paper.
    what are the grade boundaries for this paper?
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    (Original post by CelloForLife)
    what are the grade boundaries for this paper?
    oh im so sorry i meant the jan 2013 paper! sorry!
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    (Original post by SKK94)
    Exactly what I did, except that I used a straight line for perflubron and a dotted line for plasma.
    This is the only possible graph I could think of- many of my classmates did the same.
    yes line is correct too!
    but a bar will still compare each at each pressure in the table...do u thnk they ll accept a bar chart?
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    (Original post by CelloForLife)
    ohh well, how did you get this picture?
    Hey I found it whilst revising for mocks


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    (Original post by biologychemmaths)
    oh im so sorry i meant the jan 2013 paper! sorry!
    oh okay haha
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    S cello where r u from?


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    (Original post by gimme those exams)
    Dont think so, that is way too low for 3B paper. Im guessing A will be 30-34 depending on how well everyone did.
    but we all made silly mistakes, for me I guess I lost about 12 marks cause I messed the question of put the sketch iunder a paragraph, I choosen 8 not 9.and other silly stuff, hope it will be under 30 not above.and dont forget jan 2013 was a lot easier I think.
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    What did you guys write about the economic impact question?
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    Did anyone do the chemistry paper today?
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    (Original post by yiannis)
    Did anyone do the chemistry paper today?
    I did
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    What did you think?
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    It seems everyone found it easy and did pretty well; does that mean high(er) grade boundaries
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    (Original post by yiannis)
    What did you think?
    Terrible and great.

    The Bio exam, UGH. So frustrating. I have trembling hands, so the graph prediction question was so hard.
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    (Original post by daniya12)
    It seems everyone found it easy and did pretty well; does that mean high(er) grade boundaries
    I hope not ,, most of my classmates-if not all-said that the paper was hard!! So hopefully the grade boundaries won't be high!


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    Can someone post the official mark scheme ??


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    (Original post by KhawlaM)
    Can someone post the official mark scheme ??


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    Official markschemes will probably not be out until a week before results day. But If you look at the last page, you find some unofficial markschemes and suggestions to the right answers.
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    errrmmmm does anyone remember which paragraph talked about the HBOCs


    and for the table in question 2......i put faster and longer, instead of 3-4 days and 3 months...will they accept it???


    really hope grade boundaries are not that high.... made some really stupid mistakes
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    i just talked to my teacher and she said that for the mitotic index it was 6 cells and for the first question it was C :/ so there goes 3 marks,i out 7 cells instead of 6
 
 
 
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