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OCR Biology F212 Revision [3rd June 2013] (Now Closed) Watch

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    what are the mark scheme definitions for antigens and antibodies?
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    Very worried. I love biology and thought I did excellent in January!- but got a D! In the ISA I got the highest in the class.. But what gets me is exam pressure! What is there I can do?! My mind just goes blank! Any tips?


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    What are seed banks and what are the advantages and disadvantages?


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    (Original post by reemaisthinking)
    Very worried. I love biology and thought I did excellent in January!- but got a D! In the ISA I got the highest in the class.. But what gets me is exam pressure! What is there I can do?! My mind just goes blank! Any tips?


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    Just take a deep breath before any of the long/difficult questions and just think to yourself You know all this, it's just about showing those darn examiners how good you really are. Think of it as your chance to prove just how much you really know! (And you do know it!)
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    (Original post by SheriB)
    HUH? i thought amylose is made up of 1-4 gycosidic bonds? *pulls at hair* I'm so not prepared
    Amylose *is* joined together by 1,4-glycosidic bonds
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    [QUOTE=reemaisthinking;42930230]Very worried. I love biology and thought I did excellent in January!- but got a D! In the ISA I got the highest in the class.. But what gets me is exam pressure! What is there I can do?! My mind just goes blank! Any tips?


    Sleep early ...like now. Drink plenty of water ( but not so much that you need the toilet during the exam ..maybe have a shower in the morning, a good breakfast. And believe in yourself. Tell yourself that you CAN achieve an A. Tell yourself "I got this". I always repeat that to myself and it calms me down
    Idk how useful that was haha
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    Name:  ImageUploadedByStudent Room1370207984.780908.jpg
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Size:  47.8 KBGuys could someone answer the (ii) question for me -.-


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    (Original post by JMB1)
    what are the mark scheme definitions for antigens and antibodies?
    Antigens are molecules that stimulate an immune response by appearing on the surface of molecules

    Antibodies are protein molecules that take part in an immune response by neutralisation or agglutination;
    Produced by plasma cells
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    Okay I think I am just a little more ready for this. I went through everything and I did every past-paper that exist but, there are still some things I am a little unsure about.

    1) How does bacteria spoil food? *Was in a past-paper I did, 4 marks.
    2)Benefits of agriculture on biodiversity.
    3) Influenza.
    4) Progeny testing/selective breeding.

    I pretty much grasped everything else

    P.S: Guys, what do you guys think will come up?
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    (Original post by ladybug.hugsxoxo)
    Name:  ImageUploadedByStudent Room1370207984.780908.jpg
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Size:  47.8 KBGuys could someone answer the (ii) question for me -.-


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    maybe something to do with hygiene?
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    Is globular protein and fibrous protein types of quaternary structure?

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    (Original post by ladybug.hugsxoxo)
    Name:  ImageUploadedByStudent Room1370207984.780908.jpg
Views: 330
Size:  47.8 KBGuys could someone answer the (ii) question for me -.-


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    Perhaps ensuring that equipment is sterilised and to quarantine those who have the infection?
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    (Original post by Juliajuliajulia)
    Have you done all the past papers? If yes I'd say circle the bits you found particularly difficult and write some last minute flash cards of longer answers (basically learn the markscheme for a few) because knowing how to answer then could bag you 12 ish marks in the paper assuming there's a couple of long ones.
    omg thankyou so much<3

    ive concentrated so much on this that ive completley neglected my exam on wednesday fml

    goodluck to you (and everyone else), hope you all do well inshaAllah
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    (Original post by ladybug.hugsxoxo)
    Name:  ImageUploadedByStudent Room1370207984.780908.jpg
Views: 330
Size:  47.8 KBGuys could someone answer the (ii) question for me -.-


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    I did that and I wrote that the hospital can encourage people to wash their hands when they visit patients to stop it from spreading.
    Carefully clean hospital rooms and medical equipments.


    (Original post by sharifma)
    maybe something to do with hygiene?
    Yes it is.
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    Good luck everyone for tomorrow You all can do it
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    whats the difference between parasite and pathogen
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    Any predictions for the long 8/9/10 marker questions?
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    Help please! For haemoglobin, how many polypeptide subunits are there? Are we supposed to know?

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    (Original post by wndms)
    Help please! For haemoglobin, how many polypeptide subunits are there? Are we supposed to know?

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    4 polypeptide subuntis, which give it a quaternary structure. I think you should know to link it back to its structure.
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    (Original post by sharifma)
    whats the difference between parasite and pathogen
    parasite : lives in another organism as a host, benefiting from it (i.e from feeding)
    pathogen: an organism that causes disease e.g bacteria, virus or fungus
 
 
 
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