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

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    (Original post by Jeshiii)
    For the pesticide one when it said about evaporation from the lake I wrote that if the water is evaporating then the concentration of pesticides will increase as they don't evaporate with the water.
    Anyone else wrote this?

    I couldn't remember the starch stuff which annoyed me as I knew it was my bad topic.
    I wrote its insoluble in water and compact etc but non of that really answered the question did it?
    I put the same thing for the pesticides question.

    For the starch I think you had to put it was insoluble so it will not affect water potential of the cell. It won't lower w.p. so excess water will not be taken in by osmosis and the cell will not burst.
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    What was the answer to the courtship question.. asking about different pitches of birds?
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    (Original post by Jeshiii)
    For the pesticide one when it said about evaporation from the lake I wrote that if the water is evaporating then the concentration of pesticides will increase as they don't evaporate with the water.
    Anyone else wrote this?

    I couldn't remember the starch stuff which annoyed me as I knew it was my bad topic.
    I wrote its insoluble in water and compact etc but non of that really answered the question did it?
    I said about the concentration increasing too.
    What was the starch question again?
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    (Original post by parallal)
    I put the same thing for the pesticides question.

    For the starch I think you had to put it was insoluble so it will not affect water potential of the cell. It won't lower w.p. so excess water will not be taken in by osmosis and the cell will not burst.
    I did the same thing as you and went up to "water potential gradient not affected" The reason I stopped there is because the creature had a cell wall. Burst?! but i think reference had to be made to osmosis. I said "starch insoluble, doesnt lower water potential, water potential gradient not affected" and stopped there. thats why it was a tricky question. you had to work out what was going on so i just wrote that and stopped...
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    (Original post by xgoldenx)
    What was the answer to the courtship question.. asking about different pitches of birds?
    Only same species will recognise the call, then elaborated and talked more about
    the female receptive stage and female recnogising male etc.
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    (Original post by broken_rose)
    I said about the concentration increasing too.
    What was the starch question again?
    Starch is insoluble(1)
    so will not be affected by osmosis (1)
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    (Original post by EffKayy)
    Only same species will recognise the call, then elaborated and talked more about
    the female receptive stage and female recnogising male etc.
    Cool.. thats what i wrote too.
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    (Original post by xgoldenx)
    Cool.. thats what i wrote too.
    Sweeeeeet
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    (Original post by jodiedoodles)
    Somehow I managed to get the percentage increase as 122% ? Stupid thing is, I know how to do percentage increase, I must have just misread the graph.

    what did anyone get for the question about methicillin (i think) and how some kinda enzyme inhibits something...was a little 2 marker...and I didn't even have a clue...
    I got something similar for the % increase thing, over 100% anyway or whatever (20 - 9 / 9)* 100 is.

    FOr that methicillin one, I wrote something along the lines of it had a similar shape to the monomers and was therefore complementary to the enzyme but other people have said something about competitive inhibitors? To be honest, I don't even remember what the question was.
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    (Original post by Introverted moron)
    I got something similar for the % increase thing, over 100% anyway or whatever (20 - 9 / 9)* 100 is.

    FOr that methicillin one, I wrote something along the lines of it had a similar shape to the monomers and was therefore complementary to the enzyme but other people have said something about competitive inhibitors? To be honest, I don't even remember what the question was.
    Yeah it's a competitive inhibitor which competes for the active site, prevents E-S complexes.
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    (Original post by EffKayy)
    Yeah it's a competitive inhibitor which competes for the active site, prevents E-S complexes.
    Damn.......I wrote that, read the question again and then crossed it out.
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    (Original post by Introverted moron)
    Damn.......I wrote that, read the question again and then crossed it out.
    Yeah they can be very synoptic and have questions from other units.
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    (Original post by Jeshiii)
    For the pesticide one when it said about evaporation from the lake I wrote that if the water is evaporating then the concentration of pesticides will increase as they don't evaporate with the water.
    Anyone else wrote this?

    I couldn't remember the starch stuff which annoyed me as I knew it was my bad topic.
    I wrote its insoluble in water and compact etc but non of that really answered the question did it?
    - I wrote exactly that cos water would otherwise dilute it
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    (Original post by EffKayy)
    Only same species will recognise the call, then elaborated and talked more about
    the female receptive stage and female recnogising male etc.
    It wasn't asking about the process of courtship behaviour it was looking at how to identify species that way and their relationship

    So it would of been about more closely related species having more similar mating calls etc.
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    (Original post by TlanTlan)
    It wasn't asking about the process of courtship behaviour it was looking at how to identify species that way and their relationship

    So it would of been about more closely related species having more similar mating calls etc.
    Courtship BEHAVIOUR DOES identify if the species are similar. jheeze
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    (Original post by TlanTlan)
    It wasn't asking about the process of courtship behaviour it was looking at how to identify species that way and their relationship

    So it would of been about more closely related species having more similar mating calls etc.
    Mating calls = courtship behaviour.
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    Yeah i linked them together, but i thought the question wasn't asking for a description of the courtship mating behaviour.
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    ums conversion is good for biol papers, on a passed paper i got like 64/85 and using aqa website ums converter it turned out that was like 137/140 ums!!!!
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    I don't remember the courtship behaviour question :l
    What was the exact question and what other questions were asked on the same page?
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    has anyone uploaded the paper yet?
 
 
 
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