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Edexcel A2 Biology Unit 4 (6BI04) - 15 June 2012 - Official Exam Discussion Thread!!!

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    (Original post by This Honest)
    Doing this exam too. Revision's been going well.
    Gonna revise it tomorrow.
    How do you revise?
    I first learn and revise the concepts and then I try solving past papers.

    Can you help me with this, please? What do we have to know for the following specification point in unit 4 topic 6:

    13. Explain the roles of antigens and antibodies in the body’s immune response including the involvement of plasma cells, macrophages and antigen-presenting cells ??
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    (Original post by M Kh)
    How do you revise?
    I first learn and revise the concepts and then I try solving past papers.

    Can you help me with this, please? What do we have to know for the following specification point in unit 4 topic 6:

    13. Explain the roles of antigens and antibodies in the body’s immune response including the involvement of plasma cells, macrophages and antigen-presenting cells ??
    Learn info>Make sure I can recite it verbally or typewritten>Past papers

    Biology, there's a lot to learn and you may think that you know everything but in fact, you probably forgot some stuff. Writing it down again and again will re-inforce the info.
    So I use my whiteboard to write it down.

    phagocyte engulfs and destroys pathogen
    phagocyte presents pathogen's antigens on it's surface membrane
    this is called antigen processing/phagocyte is an antigen presenting cell
    t helper cells is complementary to the receptor on the phagocyte
    t helper binds to it and this stimulates the division of b cells
    b cells produce b memory cells and plasma cells
    plasma cells can give rise to antibodies which can for antibody-antigen complexes which are phagocytosed by phagocytes
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    (Original post by M Kh)
    Sorry, I don't understand what you mean. Can u please elaborate?
    Do you have any notes for Unit 4 you can up-load?
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    (Original post by d_94)
    Do you have any notes for Unit 4 you can up-load?
    Making your notes helps a lot. Try making your own notes. I am in the process of making my own notes so they aren't complete yet. If you have any specific doubts, feel free to ask.
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    (Original post by M Kh)
    Making your notes helps a lot. Try making your own notes. I am in the process of making my own notes so they aren't complete yet. If you have any specific doubts, feel free to ask.
    Hey. Ya I made my notes and it did help me, as I took stuff from other books/resources, and it helped me.
    Do you have the Unit 4 Jan 2012 paper?
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    (Original post by d_94)
    Hey. Ya I made my notes and it did help me, as I took stuff from other books/resources, and it helped me.
    Do you have the Unit 4 Jan 2012 paper?
    You can google it. It is also available in www.studentforums.biz but you have to register first and you will also find the marking scheme and the examiners reprt from this site.
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    (Original post by M Kh)
    You can google it. It is also available in www.studentforums.biz but you have to register first and you will also find the marking scheme and the examiners reprt from this site.
    Okayy. Thanks
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    (Original post by This Honest)
    Learn info>Make sure I can recite it verbally or typewritten>Past papers

    Biology, there's a lot to learn and you may think that you know everything but in fact, you probably forgot some stuff. Writing it down again and again will re-inforce the info.
    So I use my whiteboard to write it down.

    phagocyte engulfs and destroys pathogen
    phagocyte presents pathogen's antigens on it's surface membrane
    this is called antigen processing/phagocyte is an antigen presenting cell
    t helper cells is complementary to the receptor on the phagocyte
    t helper binds to it and this stimulates the division of b cells
    b cells produce b memory cells and plasma cells
    plasma cells can give rise to antibodies which can for antibody-antigen complexes which are phagocytosed by phagocytes
    Thanks.
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    (Original post by This Honest)
    Learn info>Make sure I can recite it verbally or typewritten>Past papers

    Biology, there's a lot to learn and you may think that you know everything but in fact, you probably forgot some stuff. Writing it down again and again will re-inforce the info.
    So I use my whiteboard to write it down.

    phagocyte engulfs and destroys pathogen
    phagocyte presents pathogen's antigens on it's surface membrane
    this is called antigen processing/phagocyte is an antigen presenting cell
    t helper cells is complementary to the receptor on the phagocyte
    t helper binds to it and this stimulates the division of b cells
    b cells produce b memory cells and plasma cells
    plasma cells can give rise to antibodies which can for antibody-antigen complexes which are phagocytosed by phagocytes

    Thankss <3
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    (Original post by This Honest)
    Learn info>Make sure I can recite it verbally or typewritten>Past papers

    Biology, there's a lot to learn and you may think that you know everything but in fact, you probably forgot some stuff. Writing it down again and again will re-inforce the info.
    So I use my whiteboard to write it down.

    phagocyte engulfs and destroys pathogen
    phagocyte presents pathogen's antigens on it's surface membrane
    this is called antigen processing/phagocyte is an antigen presenting cell
    t helper cells is complementary to the receptor on the phagocyte
    t helper binds to it and this stimulates the division of b cells
    b cells produce b memory cells and plasma cells
    plasma cells can give rise to antibodies which can for antibody-antigen complexes which are phagocytosed by phagocytes
    heeey
    Is this enough for the whole process ??
    I'm just wondering... my notes seeem so long for this bit
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    (Original post by aqua05)
    heeey
    Is this enough for the whole process ??
    I'm just wondering... my notes seeem so long for this bit
    Hey

    I think it's enough. If you were to write it out on an exam paper, it would be filed up :yep:
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    For phloem tissue you have to know abt sieve tubes, companion cells.
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    can anyone please give me the list of topics from AS which we have to study ?
    Pleaseee!
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    (Original post by farhanyen)
    For phloem tissue you have to know abt sieve tubes, companion cells.
    I don't think so :erm:

    (Original post by aqua05)
    can anyone please give me the list of topics from AS which we have to study ?
    Pleaseee!
    It can be anything from AS.
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    (Original post by farhanyen)
    For phloem tissue you have to know abt sieve tubes, companion cells.

    (Original post by This Honest)
    I don't think so :erm:
    Yeah, I agree with This Honest, I don't think you need to know that
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    (Original post by This Honest)
    I don't think so :erm:



    It can be anything from AS.
    so basically you studying the whole of AS ?
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    (Original post by aqua05)
    so basically you studying the whole of AS ?
    Well obviosuly not in detail, just briefly, aren't you resitting unit 4?
    You would have seen in jan there was a small section of unit 2 but none on unit 1.
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    I saw it( the phloem tissue stuff) in the implementation and assessment guide(in the section for unit 4).

    BTW, if you noticed bio papers( chem and phsyics too) in edexcel are starting to test stuff not in the books or pat papers etc. Eg in th bio unit 4 paper one qs asked for 2 types of cells infected by hiv but the book only talks abt T-helper cells. Do you know where/how candidates are supossed to know this things. If you know any resources please tell me. Thks
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    Yaa:/ I noticed that too. Its getting harder than I thought it was possible.
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    Guys um really freaked out with Bio unit 6..ne predictions what core practical might come up this year in question no 1??????

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