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

  • View Poll Results: Are you resitting this unit?
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    (Original post by HaimishaParekh)
    HEY I WROTE THIS! Please say I can still pick up SOME marks?
    Yes of course That is a valid point. Do you remember the exact phrasing of the question by any chance?

    For the other calculation - it was 1.4

    What did you get for the heart? I put 87
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    I got 1.4 as it was somink like 6.5 to 2.3 and that took 3 seconds. so 4.2/3=1.4 ??
    Then i got 85.7bpm as one cardiac cycle took 0.7 so did 60/0.7=85.7 ??
    Then the emphysema i didnt write about elastin, but put stuff about reduced SA=less diffusion, cant exhale as much=lower concentration gradient, and longer diffusion pathway because of scar tissue (not sure if thats right?).
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    (Original post by liviaaa)
    I'm pretty sure it was 85.7 rather than 100.

    We were given values e.g.:
    0.0
    0.1
    0.2
    0.3
    0.4
    0.5
    0.6
    0.7

    As the values for 0.0 and 0.7 were the same I think people are confused as if the cycle lasted 0.6 or 0.7 seconds. If you plotted the movement off the graph, and worked out the beats per minute, you would take the points on the graph that were the SAME (not the point just before), therefore you use 0.7 value. I hope that makes sense..
    If you thought one cycle lasted 0.6 seconds you got 100bpm.
    If you thought one cycle lasted 0.7 seconds you got 85.7bpm.

    Well at least thats what I think happened.
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    (Original post by EffKayy)
    What was the wording on the 6mark. Epithelial lining? Got so confused.
    URGHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHH
    It was so vague, I had no idea what they wanted so I wrote loads of random things:

    -Villi/microvilli for large SA
    -Thin cells, for short diffusion distance.
    - Sodium pump to actively transport sodium into blood to establish concentration gradient, so glucose can move into cells with sodium via cotransporter.
    - Membrane has co transporters and carrier proteins to speed up process.
    - Membrane bound enzymes to hydrolyse substances, e.g maltose so that they are small enough.
    - Lots of mitochondria as they release energy which is needed for active transport.
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    Doss exam, all that worry for nothing!
    ...1.4dms ....86bpm....easy question here, easy question there...blah blah 6 MARKS FOR EPITHELIAL CELLS? Yes please!

    BRING THE HATE.

    NB: Grade boundries are going to be sky high.
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    (Original post by archie0705)
    I got 1.4 as it was somink like 6.5 to 2.3 and that took 3 seconds. so 4.2/3=1.4 ??
    Then i got 85.7bpm as one cardiac cycle took 0.7 so did 60/0.7=85.7 ??
    Then the emphysema i didnt write about elastin, but put stuff about reduced SA=less diffusion, cant exhale as much=lower concentration gradient, and longer diffusion pathway because of scar tissue (not sure if thats right?).
    Empysema mark scheme from Jan said:

    -Alveoli break down
    -Walls thicken
    -Less surface area
    -Loss of elastin
    -Alveoli can't recoil as reducded elasticity
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    (Original post by Benevolence)
    Yes of course That is a valid point. Do you remember the exact phrasing of the question by any chance?

    For the other calculation - it was 1.4

    What did you get for the heart? I put 87
    Oh thank god. I just hope it's not on the 'neutral' side of the mark scheme..
    Unfortunately, i don't remember the exact phrasing, sorry!

    Ahhh, I put 85. It was a question i left till last (i don't know why) so it literally a guesstimate.
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    (Original post by Limitless)
    If you thought one cycle lasted 0.6 seconds you got 100bpm.
    If you thought one cycle lasted 0.7 seconds you got 85.7bpm.

    Well at least thats what I think happened.
    Yup it is
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    (Original post by Benevolence)
    I know, but the glucose is moved in the blood. When the glucose is absorbed into the epithelial cells it diffuses into the blood. The lower the conc. in the blood, the greater the rate of diffusion.

    Does anyone remember what the EXACT questions was? (or to the best of their knowledge)
    it was: how are epithelial cells in the small intestine adapted to their role in the absorption of glucose?
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    Yeah. I think, as correctly stated by other people, it would be best to not stress about it. Just trust that you will get the mark that you deserve If you put the effort and the revision in, throughout the paper, it will show

    If you didn't do too much revision, or maybe you did and still thought it went horribly, you can always do a lot better in the next exam. From what I have gathered, the majority of people found it a bit odd. People in my college were saying it was easy, as I generally thought it was. However, when I glanced across during the exam (as you do) I noticed she had quite a few things wrong.

    Other people doing badly will improve your mark. Also the mark scheme is developed from paper to paper, depending on how the candidates generally answer. The reason for this is that AQA have been in some ways notorious for asking ambiguous questions on occasion.

    So it's all good
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    (Original post by EffKayy)
    NT book about villi

    *increase surface area for diffusion
    thin wall - reduce diffusion distance
    move - mantain diffusion gradient
    supplied with blood vessels so that blood can carry away absorbed molecules

    that's all I wrote. - all wrong? I guess
    That's not wrong at all, I don't think. The blood vessels point is good. The only thing is that none are specific to glucose. That's why the question was weird.
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    (Original post by oHellno)
    That's not wrong at all, I don't think. The blood vessels point is good. The only thing is that none are specific to glucose. That's why the question was weird.
    great. might as well commit frigging suicide. cba with the frigging crappp!!!!!!!!!!! :'(
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    (Original post by liviaaa)
    Yup it is
    What did you get for the PersonA expelling air question 1.17 or 1.4 I got 1.17 but if it is wrong I think I got a mark for working out.
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    (Original post by marijuana)
    im pretty sure it was 85.7 because at the top it said something along the lines of "This shows the pressure changes during one cardiac cycle" therefore 0-0.7 is one cardiac cycle
    you had to include 0 as one, so really you divided by 0.8, the answer was 75, they would never give it to you as a decimal for beats per minute
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    (Original post by EffKayy)
    great. might as well commit frigging suicide. cba with the frigging crappp!!!!!!!!!!! :'(
    You'll probably have done better than you think. After every exam I always come out and hear what other people have put and think craappp.. but it's normally okay in the end.
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    (Original post by liviaaa)
    Empysema mark scheme from Jan said:

    -Alveoli break down
    -Walls thicken
    -Less surface area
    -Loss of elastin
    -Alveoli can't recoil as reducded elasticity
    i just copied and pasted that section of the mark scheme
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    (Original post by EffKayy)
    great. might as well commit frigging suicide. cba with the frigging crappp!!!!!!!!!!! :'(
    Nonono, I'm sure you're points will be on the markscheme, they all make sense. Don't worry about it too much, these past few days you seemed to know your stuff, I'm sure it went fine
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    Judging by past exam papers the amount you need for an A ranges between 37/60 to 40/60. But then after that the grade boundaries are really small like there is 5 marks difference between grade A + B.
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    i went through the cgp revision guide as i was waiting to sit the exam it helped
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    (Original post by aaron1989)
    i went through the cgp revision guide as i was waiting to sit the exam it helped
    CGP is awesome. I did all my revision via CGP + Past papers.
 
 
 
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