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AQA BIOL2 Biology Unit 2 Exam - 26th May 2011 Watch

  • View Poll Results: Are you resitting this unit?
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    (Original post by zimmobug)
    Why did epo decrease blood pressure
    Because it increased red blood cell production, so there's more cells per unit volume of blood. More cells in a higher space = higher pressure?
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    (Original post by nasira372)
    It did but 2 strands. so 74*2=148

    Strand A was 26 26 20 20
    Strand B was 19 19 9 9

    I think...

    That's what I got, but I think that wrong!

    Only realised this after I put my pen down at the end :mad: but the bases are not complimentary on the same strain.

    So if there was 26 for 'A' on 'strand A', it would mean the 'T' would be 26, but for 'strand B'. As the two stands slot togther.


    Also each stand would need to be 74 long, which strand B isn't...

    Probably didn't explain that too well




    I dropped so many marks, where I only realised how to do it, immediatly after the exam finished!
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    (Original post by becky16)
    yeh i found out i mucked up calculations and made stupid mistakes and now i m meant to be revising chem unit 2 ... fml

    but dont worry doesnt mean everyones right on here- there can be different ans for the same questions..
    Lol somehow I got 3500% for one of the last calculating questions
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    Am I the only one who assumed the bases to actually be a percentage out of 100?

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    (Original post by swiftylol)
    At least he did the RS one after the biology and not the other way round :P

    I did biology around 30mins after RS ( and i wrote like 15sides in rs) so all I could remember was keywords from that exam.

    Sigh, nothing I can do about it now tho...

    How did you find the DNA strand Q?
    I got 0 on that. But oh well.
    I THOUGHT I GOT THAT RIGHTT! LMAO fml
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    (Original post by SmithytheDrummer)
    The way I saw the DNA question was that if you imagined the 2 strands of DNA binded together, the number of Cytosines on the A strand equals the number of Guanines on the B strand. So it had to be diagonal otherwise it wouldnt make sense
    I did that for like 2 of them, then had to draw it out for the others, my concentration in that exam was srsly terrrrrrible.
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    (Original post by Stratos)
    Am I the only one who assumed the bases to actually be a percentage out of 100?

    I was going to do that..
    but i read the top
    BUT I STILL GOT THE QUESTION WRONG.
    so all is okay.
    NOT :'(
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    I liked the last question :P

    Didn't really understand about that erhtyprotien question to be totally honest.. specially why it increased blood cell.

    For the first time on student room.... I'm aiming for a :A: B anyways lol
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    (Original post by Is it a bird!?)
    Lol somehow I got 3500% for one of the last calculating questions
    Permit me to use the words, "haha, epic"
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    I'm most uncertain about these questions:
    10 Leaves measured in milligram : I put so a mean can be calculated & anomalies can be identified, as well as the mass change in 10 leaves will be more significant. The ideas contradict themselves in that for the first 2 i assumed an average was taken as a data on the graph whereas for the last 1 i assumed they are all measured as 1 set. So r.i.p for me.
    EPO measured per kilogram per week : I put athletes may have different body masses, and have different length of treatment.
    I put they may have different saline uptake as well but that doesn't sound right. I put it because it didn't state what the mass it was referring to, body mass? saline? r.i.p
    Frog egg being small : I put so they suspend throughout the water and easily come in contact with pesticide, as well as being small, a low concentration of pesticide would have an impact already. Second one is definitely wrong, first one, i doubt it.
    I thought of another explanation later on, which is, being small, frog eggs would have a greater surface area to volume ratio, allowing a greater chance of entry of pesticides? nahhh fk frogs.. they're the worst, like how they were in past papers...
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    (Original post by failingatm)
    Oh god Chemistry... I fail so much at chemistry. Good luck m8!
    Haha, thanks man. Good luck to you too
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    (Original post by ChessMister)
    Permit me to use the words, "haha, epic"
    You are permitted. I actually laughed xD
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    (Original post by EffKayy)
    cell wall/!?
    animals also have a cell wall though, just not cellulose
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    well after reading all of this i've done, even worse than i thought

    ..but now's not the time to worry about it, now it's time for chem revision :L
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    Jumping onto the Chemistry thread now, woo!
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    (Original post by Is it a bird!?)
    Lol somehow I got 3500% for one of the last calculating questions
    I did this first... it's because you used the value from 1994 not 1996 in the percentage increase
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    (Original post by Stratos)
    Am I the only one who assumed the bases to actually be a percentage out of 100?

    i nearly did, that's how they've done it on past papers so its understandable
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    (Original post by Is it a bird!?)
    Lol somehow I got 3500% for one of the last calculating questions
    I did too!! but then realised my mistake, you did 14/0.4 x 100?

    it was really (14-9)/9 x 100

    you didnt minus the difference and you used the number from 1994 not 1996, only 2 marks, dont worry

    what did everybody put for the bacterium in the gut question?
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    did anyone else get 55% for the percentage increase?
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    So what was the correct answer to the table of bases question? :/
 
 
 
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