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    (Original post by AnthonyShock)
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    Thats not the right paper code =/
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    :facepalm: OCR, the exam board that gives you a lot of space when only a little is needed and a little when you have plenty to write. I couldn't even fit much on the essay question on genes and homeobox, had to get some paper from the invigilators.
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    (Original post by pgreg1)
    But it could be a competitive inhibitor and therefore has a similar structure to Dopamine.
    indeed, however if it had a similar structure to dopamine it would also bind to the postsynaptic dopamine receptors and it does not, and therefore it must be a non-competitive inhibitor. Thanks to all replies! I can't figure out how to quote all 4 so i'll just say @you all.
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    how many marks would Transmissions electron microscope. would i get 1 mark for saying electron microscope?

    i think i will get a low B in this exam.
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    (Original post by pgreg1)
    But it could be a competitive inhibitor and therefore has a similar structure to Dopamine.
    but in the qu it didn't say it bound to the receptor site but it did in the other two chemicals so it was prob suggesting it was non competetive inhibitor
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    (Original post by Mrcarrot)
    indeed, however if it had a similar structure to dopamine it would also bind to the postsynaptic dopamine receptors and it does not, and therefore it must be a non-competitive inhibitor. Thanks to all replies! I can't figure out how to quote all 4 so i'll just say @you all.
    Doesn't it? I thought the question just said that it activated the Dopamine receptors. A lot of these molecules work by binding to the receptors and changing the shape of them so they are complementary to neurotransmitter - and are therefore 'activated'.

    Ah well .
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    (Original post by treesaregreenandtall)
    Thats not the right paper code =/
    Sorted :P
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    (Original post by pgreg1)
    But it could be a competitive inhibitor and therefore has a similar structure to Dopamine.
    lol yeah this is what i thought, so i put down ph... lol cannot remember exactly what i put down
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    (Original post by AnthonyShock)
    Sorted :P

    Joined =]
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    Phenelzine and Pheniprazine are the names from the exam (I think). So go ahead and look up if they're non-competitive inhibitors.
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    (Original post by A100whoo)
    Ecosystem, Producer, Primary, Trophic Level, living, nutrients!
    i wrote 'trapped energy' for the last missing word. cos that's what it said in the book so i learnt it as that.

    and yay i put living too
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    (Original post by Remarqable M)
    lol yeah this is what i thought, so i put down ph... lol cannot remember exactly what i put down

    Hang on didnt the question say choose one which had a DIFFERENT shape to dopamine? Cuz i put amphetamine since it binds to receptors to open them like Na+ does.....so doesnt have to be same shape??
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    (Original post by smflesh)
    What did you all put for the 4 marker which asked you to describe the graph with gibberellins?
    ermm said gibberellins cause seed germinations, they can dissolve in water so get to the cell. Then said that weird acid inhibits gibberellins causing no seed germination. Couldn't think of anything else.
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    (Original post by Mrcarrot)
    i hate it when your post goes to the bottom of a page...:

    The question "which drug is not similar to dopamine structurally" was a bit thought-provoking however, as they all at least bound to one thing which dopamine did, suggesting a similar structure. I went for the MAO repressing one.

    Thoughts, anyone?
    Same went for MAO repressing as you can inhibit enzymes in other ways apart from binding to their active site, but I don't think you can block receptors in any other ways apart from binding to their active site.
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    (Original post by dopeyangel101)
    i put transmission coz i couldn't like straight lol.

    Tinkerbelle, i see you said i'm near you, where exactly are you then? anyone else from Dorset or even Poole?

    on so onto the chemistry revision for tomorrow :/
    Yep, Bournemouth
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    (Original post by AnthonyShock)
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    hahahah thats amazing! i shall join when i get my facebook back..after my psyc exam on 30th
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    (Original post by Darthdevidem)
    ermm said gibberellins cause seed germinations, they can dissolve in water so get to the cell. Then said that weird acid inhibits gibberellins causing no seed germination. Couldn't think of anything else.
    It didn't ask to explain, just describe.

    - With absinsic acid treatment, there is no seed germination even with increased conc of gibberellin, so it inhibits seed germination.
    -With water treatment, without any gibberellins there is around 10% seed germination occuring.
    -With water treatment, with an increase in gibberelin conc, there is an increase in seed germination
    -At 5 moldm-3 of gibberellin for the water treatment 100% seed germination.
    -Gibberellins therefore promote seed germination, and absinsic acid inhibits it.

    That should be 4 marks. No need to explain.
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    (Original post by CHILLIN-DRAGON)
    i wrote a paragraph explaining how polypeptides are made.

    then i talked about how homeotic genes have regions called homeobox sequences that code for homeodomain, and that its works as the transicription factor , how when its attached to developmental genes its activates of represses transcription of polypeptides involved in the development of the body plan etc
    same. I used the Antp example

    and guys im sure the answer was scanning electron microscope rather than transmission
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    (Original post by thekooks)
    i wrote 'trapped energy' for the last missing word. cos that's what it said in the book so i learnt it as that.

    and yay i put living too
    Isn't it biotic? Not living.
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    (Original post by ViolinGirl)
    Isn't it biotic? Not living.
    biotic is similar to living right?

    the missing words question was the best one on the paper! anyone know how many marks it was?
 
 
 
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