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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 Clintbarton)
    All of it. They go through it and tick it when you make a correct point.
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    The thing is after saying that memory B-cells stay in the blood for a long time, my next sentence was phagocytes engulf the pathogen etc etc !!! So what will happen regarding that?? Will i still achieve full marks provided i already stated all the points, or what????
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    (Original post by rosemondtan)
    Paper was quite easy, didn't write standard form though and barely finished the last question so had no time to check lol. Calibration curve question was BOMB!!!!!
    I agreeeee!! I didn't run out of time but I was cutting it very close. Didn't have time to go over stuff. What did you put for the calibration question?


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    What did you guys put for the statistical test question?? I said find the standard deviation...
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    (Original post by Doxoco)
    Since when does a carrier protein synthesise cellulose
    In this case, it is an enzyme because it catalyses the formation reaction of cellulose. The word substrate is a big hint
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    (Original post by mightyfall)
    What did you guys put for the statistical test question?? I said find the standard deviation...
    Same, its the only thing i know on statistics.
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    (Original post by mightyfall)
    What did you guys put for the statistical test question?? I said find the standard deviation...
    I put spearman's correlation then crossed it out and wrote T-test and I kept crossing it out and I can't remember which I actually put.


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    Can someone make a markscheme lmao


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    I wanted to get an A but I don't think that's happening hopefully the second paper is better.
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    (Original post by Clintbarton)
    I agreeeee!! I didn't run out of time but I was cutting it very close. Didn't have time to go over stuff. What did you put for the calibration question?


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    Basically prepare a set of standard solutions with known concentrations of reducing sugars and carry out the benedicts test on them. Then, record the Colour values on the colorimeter and plot a graph of colorimeter value against concentration. Draw a line of best fit. Carry out the experiment and withdraw samples of the suspension at different time intervals and carry out benedicts test. Obtain the Colour value from the colorimeter and you can get the corresponding concentration of maltose in the suspension from your calibration curve. what did you put for the last question about Alzheimer's and the question about analysing the results from the monopolar mitotic spindle?
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    What did you guys say for explaining the plant cells graph?
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    (Original post by Clintbarton)
    I put spearman's correlation then crossed it out and wrote T-test and I kept crossing it out and I can't remember which I actually put.


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    It's defo t test because you are comparing 2 means
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    For the last question where it asks how that molecule could be a substrate for 2 different enzymes
    The question mentioned the subsrate to be a complex molecule so I just wrote that it has more than one binding sites. Could form more than one e-s complexes etc etc. Any thoughts?
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    (Original post by rosemondtan)
    Basically prepare a set of standard solutions with known concentrations of reducing sugars and carry out the benedicts test on them. Then, record the Colour values on the colorimeter and plot a graph of colorimeter value against concentration. Draw a line of best fit. Carry out the experiment and withdraw samples of the suspension at different time intervals and carry out benedicts test. Obtain the Colour value from the colorimeter and you can get the corresponding concentration of maltose in the suspension from your calibration curve. what did you put for the last question about Alzheimer's and the question about analysing the results from the monopolar mitotic spindle?
    Well **** I didn't put that HAHAHHA I hated that question. For the very last one? Something about inhibiting necessary proteins or something like that I can't remember! That monopolise spindle I put something like the spindle fibres aren't attached to the opposing sides of the centromere so when they shorten and pull apart in anaphase they cannot pull apart the chromosomes into individual chromatids so anaphase in unsuccessful and therefore so is mitosis.


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    Monopolar question 😢 I just wrote that chromatids are being pulled by centromere to only of pole of the cell. Number of chromosomes not able to half.
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    Why were both enzymes able to synthesise the protein??
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    (Original post by rosemondtan)
    It's defo t test because you are comparing 2 means
    Pretty sure I put t-test 👊🏽👊🏽👊🏽 hopefully lol. Did you not feel that there was some really bloody easy questions? Like that one about the phospholipid vs triglyceride I was like what is this!


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    Any thoughts on grade boundaries??
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    (Original post by mightyfall)
    Why were both enzymes able to synthesise the protein??
    Similar / same active site shape to each other which is complementary to the substrate


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    (Original post by mightyfall)
    Any thoughts on grade boundaries??
    Most people I've talked to are saying it was difficult but personally I found it quite... Average? Especially compared to those specimen papers! I reckon average grade boundaries, usual ones 75-80% A.


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    (Original post by lordkiff32)
    Same, its the only thing i know on statistics.
    I put prospective studies, as the condition of the candidate is observed and tracked over a period of 9 months since the initial.
 
 
 
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