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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 Stratos)
    I'm starting my revision now...

    I was wondering whether we would have to discuss cytokines for the humoral immunity. Or is that a step to high for AS?
    too high for unit 1
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    (Original post by Stratos)
    I'm starting my revision now...

    I was wondering whether we would have to discuss cytokines for the humoral immunity. Or is that a step to high for AS?
    Ctyokines stimulate B-Cells right?
    My teacher didn't know what they were when I asked. =.=
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    can someone please explain to me the different measurements we need to know?
    e.g. how many um and nm there are in 1 mm
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    Would just like to wish everyone luck for tomorrow, don't panic when they inevitably ask us something we haven't been taught as such- read the question and use the knowledge you do have!

    This will be the 3rd time I've sat unit 1, 3rd time lucky eh?!
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    (Original post by DoaaK)
    can someone please explain to me the different measurements we need to know?
    e.g. how many um and nm there are in 1 mm
    1 = 1km
    1^-3 = 1mm
    1^-6 =1um
    1^19 =1nm
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    (Original post by whiskeyinthejar)
    Would just like to wish everyone luck for tomorrow, don't panic when they inevitably ask us something we haven't been taught as such- read the question and use the knowledge you do have!

    This will be the 3rd time I've sat unit 1, 3rd time lucky eh?!
    Same here! Its annoying because its the easiest module yet I always end up doing worse than i thought :P
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    (Original post by RG1994)
    1 = 1km
    1^-3 = 1mm
    1^-6 =1um
    1^-9 =1nm
    sorry mistake there
    1^-9 =1nm
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    (Original post by RG1994)
    sorry mistake there
    1^-9 =1nm
    thankyou
    so do i basically just add 000 each time?

    so 1000 um = 1mm?
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    what does everyone think the hardest topic is for Unit 1?
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    (Original post by liviaaa)
    It moves from roothair cell, to xylem by osmosis. Up the xylem by cohesion-tension, cappilarity or root pressure. NOT active transport - that requires ATP, and the xylem is made from dead cells.

    --

    Anyway this is AQA unit 1, not OCR unit 2.
    Its for unit 1 of OCR, not unit 2? And thanks
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    (Original post by DoaaK)
    can someone please explain to me the different measurements we need to know?
    e.g. how many um and nm there are in 1 mm
    1mm = 1,000 micrometere
    1mm = 1,000,000nm
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    (Original post by RG1994)
    sorry mistake there
    1^-9 =1nm
    i think its 1=1m, not a km
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    (Original post by anna258)
    what does everyone think the hardest topic is for Unit 1?
    deffoooooo immunity!
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    i reckon digestive system, amino acids bonding, tests and structure of a protein will come up
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    (Original post by emmaaa65)
    1mm = 1,000 micrometere
    1mm = 1,000,000nm
    thankyou
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    whats the chemical used for the buiret test? is it copper(II) sulfate? or am i thinking of benedicts?
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    (Original post by whiskeyinthejar)
    Would just like to wish everyone luck for tomorrow, don't panic when they inevitably ask us something we haven't been taught as such- read the question and use the knowledge you do have!

    This will be the 3rd time I've sat unit 1, 3rd time lucky eh?!
    Sup 3rd time buddy. I just want an A in this
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    (Original post by emmaaa65)
    whats the chemical used for the buiret test? is it copper(II) sulfate? or am i thinking of benedicts?
    they both use copper (ii) sulphate
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    check this out for the HSW questions. It might help some of you
    http://www.thestudentroom.co.uk/show...php?p=31420645
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