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AQA AS Biology 7401/1 and 7401/2 Exam - 26th May and 7th June 2016 Watch

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    (Original post by rafiuddin)
    if they used any larger conc, the circles would overlap, thus ruining the experiment etc
    Rahh wrote that still
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    (Original post by Virolite)
    hydrolysis of ATP produces phosphate which is evidence for respiration occuring

    phosphate is also used in the formation of bilayer (cell membrane) which indicates cell division etc..


    Do you for the question on why you test FEV on 25 year olds the (2mark one) and the one about how to make sure the FEV is a reliable mean???
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    Yeah I thought two really strange questions were the Stair Walking FEV1 question and the 40% disinfectant, what did you get for them?
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    (Original post by zigocarn)
    Yes!!
    Also, what did you get for the 'walking up the stairs' FEV question?
    low FEV= less air breathed in and out, low conc gradient from capilarries to air etc, less O2 for respiration, less energy released at the respiring cells, thus more tiring
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    (Original post by Jumay)
    Yeah I thought two really strange questions were the Stair Walking FEV1 question and the 40% disinfectant, what did you get for them?
    40% one, any more it would overlap

    FEV one, less air breathed in and out, low conc gradient, less O2, less respiration, less energy released at respiring cells
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    (Original post by Hello_987123)
    Do you for the question on why you test FEV on 25 year olds the (2mark one) and the one about how to make sure the FEV is a reliable mean???
    dont know which question asked about why chose 25 year olds

    but the reliable one, i wrote large sample and chosen randomly, pretty generic answers though
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    (Original post by rafiuddin)
    the diameter wasn't three times bigger, but the area was, you had to find area not just the diameter
    this.
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    (Original post by rafiuddin)
    low FEV= less air breathed in and out, low conc gradient from capilarries to air etc, less O2 for respiration, less energy released at the respiring cells, thus more tiring
    how many marks was it?
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    (Original post by zigocarn)
    how many marks was it?
    3 iirc
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    (Original post by rafiuddin)
    40% one, any more it would overlap

    FEV one, less air breathed in and out, low conc gradient, less O2, less respiration, less energy released at respiring cells
    Yeah got something along those lines for the FEV1

    What do you mean by overlap?
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    (Original post by Jumay)
    Yeah got something along those lines for the FEV1

    What do you mean by overlap?
    The clear zones.
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    (Original post by rafiuddin)
    40% one, any more it would overlap

    FEV one, less air breathed in and out, low conc gradient, less O2, less respiration, less energy released at respiring cells
    And produces lactic acid ...due to low supple of oxygen
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    (Original post by Jumay)
    Yeah got something along those lines for the FEV1

    What do you mean by overlap?
    the clear zones in the petri dish from one paper disk and another (the >40% one) would overlap, so you wont be able to calculate the area of each clear zone accurately
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    (Original post by Asad_2015)
    And produces lactic acid ...due to low supple of oxygen
    rahh, didn't write that, hopefully the rest i wrote is enough for 3 marks
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    (Original post by rafiuddin)
    the clear zones in the petri dish from one paper disk and another (the >40% one) would overlap, so you wont be able to calculate the area of each clear zone accurately
    What did you get for the adaptation question re: the embryos?
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    (Original post by rafiuddin)
    rahh, didn't write that, hopefully the rest i wrote is enough for 3 marks
    Tbf lactic acid isn't mentioned in the textbooks or specification, so I doubt it will be a marking point.
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    (Original post by zigocarn)
    What did you get for the adaptation question re: the embryos?
    don't remember the question, can you give more detail?
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    (Original post by kiwifruit99)
    Wouldn't water move out of the worm? Because water moves from higher water potential in worm to lower water potential in sea water?
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    Yep silly me -_- 2 marks gone ****
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    (Original post by rafiuddin)
    don't remember the question, can you give more detail?
    I think it was to do with chilling requirement and how the species are able to adapt and respond to seasonal changes?
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    (Original post by Virolite)
    it would never be possible to include every topic within two papers, furthermore if you only revised 6 topics you can't blame AQA if you fail.
    i was just joking lol. But those topics make up about 4/5 chapters which is a third of the spec and the amount of enzymes in there was undeniably abnormal
 
 
 
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