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    (Original post by jjblok)
    If all of that is true about pathogens, then why would the body simultaneously sweat?
    Because viruses and bacteria reproduce best at precisely 37 celsius. Your body wants to generate enough heat to get above that so it shivers, but it doesn't want to surpass 39-40 celsius so you sweat simultaneously to prevent that.
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    why wasn't the electron transport chain the matrix, the cristea adn the intermembrane space?
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    For the shivering one I swear it said in the question that the fever increases the temperature setpoint of the body (which is the standard temperature the body thinks it should be at) so the body would be lower than that temperature and would try and counteract that by shivering to release heat energy. Or have I gone completely mental?
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    "Want to fail all your exams? Want to learn interesting subjects like physics and biology but want to get screwed over at the end when you only needed about 15% of it? Want to do ambiguous application of knowledge questions? Want to waste time and ruin your life? Come on down to OCR today!" - OCR
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    (Original post by Munrot07)
    Sounds like a mean paper. TBH this has been a common occurrence for OCR over the last few years. They make unit 4 the hardest in terms of content with all the different processes to remember and then they just question you on crap which people who haven't learnt A level biology could do. I'm hoping with the new syllabus they stop wasting paper space by adding **** questions and actually test you on what you have learnt. Applied questions are fine, they are useful in fact but at least make it relevant to the material learnt.
    You helped me revise. I would not be feeling as confident about my grade on that paper if it wasn't for your videos. I watched your one on the kidney this morning!
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    (Original post by NilaJ)
    possibly an A, we have no idea of the grade boundaries
    whats the point I needed like 80 UMS from this for an A overall.
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    (Original post by JoshFH)
    thats the correct method but its definately 93 not triple digits
    Think it is three significant figures as all the values were given to 3 sig figs.
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    (Original post by Munrot07)
    Sounds like a mean paper. TBH this has been a common occurrence for OCR over the last few years. They make unit 4 the hardest in terms of content with all the different processes to remember and then they just question you on crap which people who haven't learnt A level biology could do. I'm hoping with the new syllabus they stop wasting paper space by adding **** questions and actually test you on what you have learnt. Applied questions are fine, they are useful in fact but at least make it relevant to the material learnt.
    hey

    does the electron transport chain use the matrix, the cristae and the intermembrane space or just the cristae?

    and why did ocr say ' you can use one or more than one or NONE like seriously!!!!!!!!!!!!
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    Probably didnt get an A let alone the UMS i need, now i will never be a Doctor
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    Why did i find this exam pretty easy???
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    This paper was horrific.

    For the dialysis fluid being dextrose question i put it was added to make a diffusion gradient so the substances in blood could be filtered, as using just water would be only water would move by in or out of the blood, however substances such as glucose which maybe in excess would remain the blood and not be filtered out.

    for the insulin secretion question i put that the potassium ion channels may remain closed for a long period resulting in the B cell to remain depolarized thus meaning calcium voltage gated ion channels remain open and they keep diffusing into cell resulting in vesicles moving and binding with b cell membrane and insulin being released.

    Both of these answers are probably wrong and i need to get a high A (at least 80 ums) in this.......goodbye UCL
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    is saying they have ion channels enough or too vague in the similarities between the neurones question
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    (Original post by cfcforever)
    This paper was horrific.

    For the dialysis fluid being dextrose question i put it was added to make a diffusion gradient so the substances in blood could be filtered, as using just water would be only water would move by in or out of the blood, however substances such as glucose which maybe in excess would remain the blood and not be filtered out.

    for the insulin secretion question i put that the potassium ion channels may remain closed for a long period resulting in the B cell to remain depolarized thus meaning calcium voltage gated ion channels remain open and they keep diffusing into cell resulting in vesicles moving and binding with b cell membrane and insulin being released.

    Both of these answers are probably wrong and i need to get a high A (at least 80 ums) in this.......goodbye UCL
    lool more like hello UCL!
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    Oh yeah and for the question about adaptions of granum structure i put it was surrounded by stroma so products of the light dependent stage could easily move into the stroma for use in the light independent stage.

    is this right?
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    what will 47 be? in terms of UMS
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    (Original post by games211)
    lool more like hello UCL!
    No way, what do you mean???
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    That calculation question I think the answer was 93 but did we have to give it to any certain sig figs or decimal places? Please say it was just 93 on that answer line lol
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    (Original post by Captain Anonymous)
    what will 47 be? in terms of UMS

    I reckon 82
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    Omg for labelling the mitochondrial, could you just put the letters ?


    Posted from TSR Mobile
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    (Original post by AsianBeauty)
    Omg for labelling the mitochondrial, could you just put the letters ?


    Posted from TSR Mobile
    why wasn't the electron transport chain the matrix, the cristea adn the intermembrane space?
 
 
 
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