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AQA BIOL1 Biology Unit 1 Exam - 16th May 2011 Watch

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    (Original post by liviaaa)
    Mulitplying it by 100,000 wouldn't get it per 100,000.
    I think it does.

    So lets say there were 500 deaths from cause X in population Y of 5,000,000.

    (500/5,000,000)x100,000 . Gives 10 deaths per 100,000 people from cause X in population Y.

    I can swear that was the formula for it.
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    Didnt the question ask to calculate the RATE of breast cancer deaths?
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    Mine went great, I don't know what to say Really only had one moment where I had to stab at the answer, which was the reducing sugar test. I took a shot and said to add Benedict's Reagent and that a red precipitate would form. Turns out that was completely correct I couldn't be sure that it was either Benedict's or that a red precipitate would form (unless my subconscious was putting them together). Pretty chuffed at that.

    I stated these for the Epithelial cell:

    -Mitochondria to produce ATP for active transport
    -Microvilli to increase surface area and therefore diffusion rate
    -Thin surface of microvilli to increase diffusion rate
    -carrier and channel proteins to allow access for products of digestion
    -sodium-glucose co-transporters for active transport of glucose
    -free sodium in cytoplasm that can be ejected into lumen to stimulate active transport

    for the phagocyte I put:

    -phagocyte recognises pathogen as non-body cell
    -phagocyte's cytoplasm moves around pathogen
    -pathogen suspended in vacuole
    -lysosome fuses with vacuole
    -lysosome releases lysosomal enzymes which digest and kill pathogen
    -phagocyte presents pathogen's antigen's on it's surface

    For the 4-mark Emphysema I put:

    -Phagocytes release enzyme which digests elastin in cell walls
    -prevents alveoli from recoiling and expelling air so less fresh oxygen can enter
    -breaks down alveoli walls which decreases surface area and therefore increasing diffusion rate
    -particles in lungs thicken alveoli wall that's left increasing diffusion rate


    Pretty happy I think
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    (Original post by Reminisce)
    It should, say 5000 people in 1 000 000 people, divide 5000/1000000 = 0.005 and multiplied by 100 000 gives 500 per 100 000 which does make sense.

    (Original post by TlanTlan)
    I think it does.

    So lets say there were 500 deaths from cause X in population Y of 5,000,000.

    (500/5,000,000)x100,000 . Gives 10 deaths per 100,000 people from cause X in population Y.

    I can swear that was the formula for it.
    Oh okay that would make sense. The orginal comment just said multiply by 100,000 and didn't include the division prior to it ^ which is what confused me.
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    (Original post by EffKayy)
    the NT includes about glucose and then talks about villi! do you have NT?
    I do but hardly use it.
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    (Original post by Wick3d)
    I think you only need 240 UMS to get an A.
    Yeah, the 30/50 is around 30UMS.
    I need 210 more. I think I got 40-45 today. Thats 70 UMS maximum.

    Therefore, I need 140/140 on thursday. I dont even know half the content. FML
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    (Original post by EffKayy)
    Didnt the question ask to calculate the RATE of breast cancer deaths?
    I think it vaguely asked how they calculated for each country or something.
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    Sorry to harp on, but what is this pH question everyone is talking about? Something about people saying they put litmus paper and how that could be wrong....

    I can't gauge the question from the context.
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    I'm going until I realize how much worse I have done. Cya.
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    (Original post by JSLCampbell)
    Mine went great, I don't know what to say Really only had one moment where I had to stab at the answer, which was the reducing sugar test. I took a shot and said to add Benedict's Reagent and that a red precipitate would form. Turns out that was completely correct I couldn't be sure that it was either Benedict's or that a red precipitate would form (unless my subconscious was putting them together). Pretty chuffed at that.

    I stated these for the Epithelial cell:

    -Mitochondria to produce ATP for active transport
    -Microvilli to increase surface area and therefore diffusion rate
    -Thin surface of microvilli to increase diffusion rate
    -carrier and channel proteins to allow access for products of digestion
    -sodium-glucose co-transporters for active transport of glucose
    -free sodium in cytoplasm that can be ejected into lumen to stimulate active transport

    for the phagocyte I put:

    -phagocyte recognises pathogen as non-body cell
    -phagocyte's cytoplasm moves around pathogen
    -pathogen suspended in vacuole
    -lysosome fuses with vacuole
    -lysosome releases lysosomal enzymes which digest and kill pathogen
    -phagocyte presents pathogen's antigen's on it's surface

    For the 4-mark Emphysema I put:

    -Phagocytes release enzyme which digests fibrin in cell walls
    -prevents alveoli from recoiling and expelling air so less fresh oxygen can enter
    -breaks down alveoli walls which decreases surface area and therefore increasing diffusion rate
    -particles in lungs thicken alveoli wall that's left increasing diffusion rate


    Pretty happy I think
    This all sounds good The last bit about Emphysema, I thought it was elastin destroyed though, not fibrin?
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    (Original post by nasira372)
    Yeah, the 30/50 is around 30UMS.
    I need 210 more. I think I got 40-45 today. Thats 70 UMS maximum.

    Therefore, I need 140/140 on thursday. I dont even know half the content. FML
    That 40-45 ranges in the 80+ UMS. Also, you can easily retake your ISA.
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    (Original post by JSLCampbell)
    Mine went great, I don't know what to say Really only had one moment where I had to stab at the answer, which was the reducing sugar test. I took a shot and said to add Benedict's Reagent and that a red precipitate would form. Turns out that was completely correct I couldn't be sure that it was either Benedict's or that a red precipitate would form (unless my subconscious was putting them together). Pretty chuffed at that.
    Pretty happy I think

    I put it would turn an orange-brown colour :/
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    (Original post by Scaudwell)
    Sorry to harp on, but what is this pH question everyone is talking about? Something about people saying they put litmus paper and how that could be wrong....

    I can't gauge the question from the context.
    The answer was buffer solution, it that helps you remember.
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    I put "elastic fibres" for the emphysema question, will i lose the mark?
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    (Original post by Scaudwell)
    Sorry to harp on, but what is this pH question everyone is talking about? Something about people saying they put litmus paper and how that could be wrong....

    I can't gauge the question from the context.
    How could you maintain the PH of the wells in the agar jelly?

    The answer was a buffer solution I think..
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    (Original post by Wick3d)
    That 40-45 ranges in the 80+ UMS. Also, you can easily retake your ISA.
    I hope 40/60 gets me 80UMS. Then I only need 130/140 in Unit 2. Theres no point retaking the ISA, we apply to uni with the AS grades we have

    looks like I will have to settle for AAAE. Thanks for making me feel a little better though
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    I took my ISA practical in march...should I already have my results??
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    (Original post by nasira372)
    I hope 40/60 gets me 80UMS. Then I only need 130/140 in Unit 2. Theres no point retaking the ISA, we apply to uni with the AS grades we have

    looks like I will have to settle for AAAE. Thanks for making me feel a little better though
    I'm sure you can apply to Uni with your AS grade pending.
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    (Original post by Emily90)
    I took my ISA practical in march...should I already have my results??
    Depends on your teacher. I nagged mine to give it after she marked it.
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    (Original post by Emily90)
    I took my ISA practical in march...should I already have my results??
    The deadline for sending them was friday 13th May so your teacher must know your grades
 
 
 
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