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    (Original post by [email protected])
    Does anyone know why vaccinations wear off after a while and have to be repeated?
    Passive immunity is only effective for a short time as it involves putting 'ready-made' antibodies into the patient's body, and antibodies only last a short time before they break up (a few weeks or months). Active immunity can last for years as it is achieved by making the immune system make its own memory cells, which can last considerably longer than antibodies.
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    (Original post by Brad0440)
    As the heading aren't very clear, I'll put a list of them here in the same order as they are on the image:

    Chloroplasts in photosynthesis
    Photosynthesis
    -Energy from light to break up water
    -Hydrogen stored as a fuel in glucose by combination with CO2 and releasing O2
    Light dependent reactions
    ATP as energy
    Light independent reactions
    Use of light independent reaction products
    NPP + GPP
    Trophic levels
    Carbon cycle
    Biotic and abiotic factors
    Ecology study
    Niche
    Succession
    Global warming cause and effect
    Temperature and enzyme activity
    Temperature and development
    Evidence for global warming
    Global warming controversial evidence
    Change in allele frequency due to mutation/natural selection
    Speciation
    Antibitoic resistance
    Accepting evidence due to peer review etc.
    Nature of the genetic code
    Protein synthesis
    Exons
    DNA profile
    PCR
    Gel electrophoresis
    Bacteria Vs. viruses
    Decomposition by micro-organisms
    Barriers to infection
    Specific bacterial and viral diseases (i.e. TB and HIV)
    Non-specific immune system
    Cells etc. within the immune system (e.g. T-cells, antibodies, etc.)
    Immunity
    Antibiotic types (static/cidial)
    Antibiotic effects ('Clear zone' practical)
    Death-forensics

    Sorry about the poor hand-writing, and I can't guarantee that I haven't missed any questions out. Also, the last column is just my predictions as to what could come up in this paper and can be ignored.
    Hey thanks!

    And the ones you've crossed are the ones that HAVENT turned up on that particular paper, right?
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    (Original post by [email protected])
    Does anyone know why vaccinations wear off after a while and have to be repeated?
    I'm not sure all of them do - but my guess is that some of them need to be re-updated as the bacteria from different diseases mutate and become resistant to the original vaccination.
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    (Original post by Brad0440)
    As the heading aren't very clear, I'll put a list of them here in the same order as they are on the image:

    Chloroplasts in photosynthesis
    Photosynthesis
    -Energy from light to break up water
    -Hydrogen stored as a fuel in glucose by combination with CO2 and releasing O2
    Light dependent reactions
    ATP as energy
    Light independent reactions
    Use of light independent reaction products
    NPP + GPP
    Trophic levels
    Carbon cycle
    Biotic and abiotic factors
    Ecology study
    Niche
    Succession
    Global warming cause and effect
    Temperature and enzyme activity
    Temperature and development
    Evidence for global warming
    Global warming controversial evidence
    Change in allele frequency due to mutation/natural selection
    Speciation
    Antibitoic resistance
    Accepting evidence due to peer review etc.
    Nature of the genetic code
    Protein synthesis
    Exons
    DNA profile
    PCR
    Gel electrophoresis
    Bacteria Vs. viruses
    Decomposition by micro-organisms
    Barriers to infection
    Specific bacterial and viral diseases (i.e. TB and HIV)
    Non-specific immune system
    Cells etc. within the immune system (e.g. T-cells, antibodies, etc.)
    Immunity
    Antibiotic types (static/cidial)
    Antibiotic effects ('Clear zone' practical)
    Death-forensics

    Sorry about the poor hand-writing, and I can't guarantee that I haven't missed any questions out. Also, the last column is just my predictions as to what could come up in this paper and can be ignored.
    you are an actual life saver!
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    (Original post by nukethemaly)
    Hey thanks!

    And the ones you've crossed are the ones that HAVENT turned up on that particular paper, right?
    Sorry, should have made it clear, the crosses means that that question IS in that particular past paper.
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    (Original post by Brad0440)
    Sorry, should have made it clear, the crosses means that that question IS in that particular past paper.
    Ah, thanks! That's quite clever, I might do the same for unit 5
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    (Original post by C94)
    I need a 86/120 UMS in unit 4 and unit 5 to get an overall B.

    I'm screwed.
    Same position. Doesn't help that I don't know what my coursework is gonna be *sighs*


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    (Original post by Brad0440)
    Passive immunity is only effective for a short time as it involves putting 'ready-made' antibodies into the patient's body, and antibodies only last a short time before they break up (a few weeks or months). Active immunity can last for years as it is achieved by making the immune system make its own memory cells, which can last considerably longer than antibodies.
    Thanks
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    (Original post by bethanyfish)
    I'm not sure all of them do - but my guess is that some of them need to be re-updated as the bacteria from different diseases mutate and become resistant to the original vaccination.
    Thanks
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    can someone explain jan 2012 6)a)ii
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    does anyone have a link to the Jan 2013 paper by any chance? Absolutely ****ting myself for this one.. I've revised everything from the CPG textbook but the questions on the exam and mark scheme are soo different! I don't always understand the way they are worded and some seem so irrelevant to the specification. And I need to get a B in this to get into uni do you think unit 5 is easier?
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    (Original post by iwantopas19)
    can someone explain jan 2012 6)a)ii
    They are asking for overall percentage increase from Jan to May.
    So first, find the values of NPP at each month
    Jan = 1 gm^2
    May = 11 gm^2
    Percentage increase = (difference/ initial value) x 100
    = (11 - 1)/10 x 100
    = 1000 %
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    (Original post by S-Angel)
    does anyone have a link to the Jan 2013 paper by any chance? Absolutely ****ting myself for this one.. I've revised everything from the CPG textbook but the questions on the exam and mark scheme are soo different! I don't always understand the way they are worded and some seem so irrelevant to the specification. And I need to get a B in this to get into uni do you think unit 5 is easier?
    Search freeexampapers.com

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    (Original post by iwantopas19)
    can someone explain jan 2012 6)a)ii
    It asked for the percentage increase of NPP between jan to may so at jan NPP was 1 and in May its 11 so percetnage change is 11-1=10 and 10/1 *100 which = 1000%
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    does anyone know what exactly we have to know about TB and what kind of big mark questions they can ask. thx
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    1. 1. Chloroplasts in photosynthesis
    2. 2. Photosynthesis
      -Energy from light to break up water
      -Hydrogen stored as a fuel in glucose by combination with CO2 and releasing O2
      3. Light dependent reactions
      4. ATP as energy
      5. Light independent reactions
      6. Use of light independent reaction product
      7. NPP + GPP
      8. Trophic levels
      9. Carbon cycle
      10. Biotic and abiotic factors
      11. Ecology study
      12. Niche
      13. Succession
      14. Global warming cause and effect
      15. Temperature and enzyme activity
      16. Temperature and development
      17. Evidence for global warming
      18. Global warming controversial evidence
      19. Change in allele frequency due to mutation/natural selection
      20. BLANK
      21. Speciation
      22. Antibitoic resistance
      23. Accepting evidence due to peer review etc.
      24. Nature of the genetic code
      25. Protein synthesis
      26. Exons
      27. DNA profile
      28. PCR
      29. Gel electrophoresis
      30. Bacteria Vs. viruses
      31. Decomposition by micro-organisms
      32. Barriers to infection
      33. Specific bacterial and viral diseases (i.e. TB and HIV)
      34. Non-specific immune system
      35. Cells etc. within the immune system (e.g. T-cells, antibodies, etc.)
      36. Immunity
      37. Antibiotic types (static/cidial)
      38. Antibiotic effects ('Clear zone' practical)
      39. Death-forensics


    I tried to make a clearer list by editing the numbers on into paint. I made a mistake at number 20 though, so please overlook that!

    Thanks to Brad0440 for the initial list!
    Attached Images
     
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    (Original post by nukethemaly)
    Ah, thanks! That's quite clever, I might do the same for unit 5
    I was going to do one for that after my chemistry exam on Wednesday. :P
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    (Original post by diggy)
    Search freeexampapers.com

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    thanks!
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    (Original post by Sravya)
    What have you got in the other modules?
    Quite bad actually,

    Unit 1 = 77 UMS
    Unit 2 = 78 UMS
    AS Coursework = 54 UMS
    A2 Coursework = 39 UMS, <---This has not been confirmed yet though. I think it is worth more.

    So that is 248 UMS altogether

    420-248=172 Ums

    172/2 = 86 UMS per paper, is that right?
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    (Original post by Brad0440)
    I was going to do one for that after my chemistry exam on Wednesday. :P
    OCR B by any chance?
 
 
 
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