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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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    The paper was awesome! Much better than expected
    Can anyone tell me how a many cells they identified to be undergoing mitosis to calculate the mitosis index?




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    And what was the answer to the o.3mm to 0.5mm and o.5 to 0.9mm?

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    i counted 6 cells out of 84 cells so the percentage is 7.14%.
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    (Original post by liowwc)
    i counted 6 cells out of 84 cells so the percentage is 7.14%.
    I got 5 out of 84... someone else at my school got 4.... I wonder what the allowance is.

    Also for the first question, what did you guys put?
    C or D?
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    (Original post by leafy9)
    I got 5 out of 84... someone else at my school got 4.... I wonder what the allowance is.

    Also for the first question, what did you guys put?
    C or D?
    D. Logically the most bottom part is actively dividing no?
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    (Original post by liowwc)
    i counted 6 cells out of 84 cells so the percentage is 7.14%.
    I put 6 out of 84 too, but frm my school I think Im the only one. Most put 4 and a few 5

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    I put 4 but I have a feeling it's bound to be six since that's what most from my cool put?


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    Damn i put 3. Lol 3 marks gone for that then?


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    I counted 4 cells for the first one and 5 cells for the other one....correct?
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    The range for the mitotic index wud be between 4-7 cells
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    I counted 3 for the first one too
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    there was 2 marks for the first one so dun worry! but they may also put a range for the first one like 3/4-6 maybe
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    Also what was the answer for the mcq? I put D :/
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    i put C


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    D


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    c i guess what was that 05 and 0.9 difference guys
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    1.30 i hav chem exmz scary :/
    who else is doin the exmz and at wht tym
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    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 Name:  ImageUploadedByStudent Room1367987754.523148.jpg
Views: 215
Size:  71.4 KB
    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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    Hey Kaju I'm doing the exam at 1:30 :/


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    Sweet Strawberry
    Is it ok to write instead of negative correlation this: like as x increse, y decrease?
    and the paragraph for the economic issue was 9 right?
 
 
 
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