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OCR Biology F212 (Molecules, Biodiversity, Food and Health)- 21st May 2012

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    (Original post by salma25)
    What do you have to know for measuring biodiversity

    simpsons index
    quadrats -transects
    is there a belt transect?

    tunnelling
    shaking the tree and catch the insects that fall on white paper
    pitfall

    i might be making up names i tend to that quite a lot
    ANYONE????
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    (Original post by Dan12)
    I'm an A2 student as well; this could be a synoptic question which relates to mutations. This would be a brilliant question for F215
    can u ask me questions?
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    (Original post by The Illuminati)
    K I'll give it a try. Tar in cigarettes smoke contains carcinogens which are reaches the lungs via inhalation. The carcinogens can enter the nucleus and cause a mutation by altering DNA. The mutation may lead to uncontrollable cell division (cell divisions exceed Hayflick limit), apoptosis doesn't happen so this progresses to form a tumour.

    Dunno how many marks that is but I doubt it's 12!
    I'd probably give it 7. You could talk about conversion of protooncogenes to oncogenes. And refer to it as a malignant tumour. Two examples of mutagens are benzopyrene and formaldehyde. By the way, stating that tar destroys cilia would give you 2 marks. Also, refer to the mutation as a random mutation. You could also maybe talk about transcription being slowed down and it being switched off.
    You have good synoptic knowledge though.
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    (Original post by otrivine)
    can u ask me questions?
    From what unit? I'm going out now so I'll think of some questions
  5. Offline

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    (Original post by Dan12)
    From what unit? I'm going out now so I'll think of some questions
    unit 2 please
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    Have a go at the question I posted earlier.
    Outline how lung cancer is caused (12 marks)
    Refer to two mutagens in your answer
  7. Offline

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    (Original post by Dan12)
    Have a go at the question I posted earlier.
    Outline how lung cancer is caused (12 marks)
    Refer to two mutagens in your answer
    benopyrene
    carcionogenos deopisted
    -mutation
    the carcinogen enters nuclueus in alveoli
    and changes genetic material and can cause cell to divide uncontrollably. and affects DNA replication and affects activity of enzymes
    these are enough points the book does not mention more reason
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    (Original post by otrivine)
    benopyrene
    carcionogenos deopisted
    -mutation
    the carcinogen enters nuclueus in alveoli
    and changes genetic material and can cause cell to divide uncontrollably. and affects DNA replication and affects activity of enzymes
    these are enough points the book does not mention more reason
    I'd probably give you 5 marks
    - protooncogenes are converted to oncogenes
    - no apoptosis (programmed cell death)
    - forms malignant tumour
    - tar destroys cilia (2 marks for saying three words)
    - another mutagen is formaldehyde
    - say the carcinogens are in the tar

    the first two points relate to F215 more but these points would be in the mark scheme for this question.
  9. Offline

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    (Original post by otrivine)
    benopyrene
    carcionogenos deopisted
    -mutation
    the carcinogen enters nuclueus in alveoli
    and changes genetic material and can cause cell to divide uncontrollably. and affects DNA replication and affects activity of enzymes
    these are enough points the book does not mention more reason
    a) What does cellulase do? (2 marks)
    b) Explain the benefit of humans having the gene that codes for cellulase? (4 marks)
    c) Palladium is an inhibitor of cellulase. Explain how palladium could inhibit cellulase (4/5 marks)
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    you dont get 12 markers in f212 lol......

    max 8
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    (Original post by Dan12)
    I'd probably give you 5 marks
    - protooncogenes are converted to oncogenes
    - no apoptosis (programmed cell death)
    - forms malignant tumour
    - tar destroys cilia (2 marks for saying three words)
    - another mutagen is formaldehyde
    - say the carcinogens are in the tar

    the first two points relate to F215 more but these points would be in the mark scheme for this question.
    :eek::eek: Are these all in the course???
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    Finding it hard to revise for this exam, so much memorising to do. Only a week to go :cry2:
  13. Offline

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    (Original post by alilonghorn)
    Finding it hard to revise for this exam, so much memorising to do. Only a week to go :cry2:
    i think i've memorised nearly everything now (I hope) :/ good luck to you anyways
  14. Offline

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    (Original post by has87)
    i think i've memorised nearly everything now (I hope) :/ good luck to you anyways
    I've been working on Chemistry for the last week, feel like there's no room in my head for Biology too! I'm sure it'll be alright once I get in to it but at the moment just looks like there's too much to do, too much to learn before I even start to revise it :/ good luck to you as well
  15. Offline

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    (Original post by alilonghorn)
    I've been working on Chemistry for the last week, feel like there's no room in my head for Biology too! I'm sure it'll be alright once I get in to it but at the moment just looks like there's too much to do, too much to learn before I even start to revise it :/ good luck to you as well
    Aaah okay, I'm gonna work on chemistry next tuesday.. you doing AQA?
  16. Offline

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    (Original post by has87)
    Aaah okay, I'm gonna work on chemistry next tuesday.. you doing AQA?
    Yeah AQA Chem 2, so glad I'm not doing the Chem 1 resit today!
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    i hate this exam!!!
  18. Offline

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    (Original post by narli)
    i hate this exam!!!
    can u ask me question?
  19. Offline

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    (Original post by otrivine)
    can u ask me question?
    have u done all the past papers?
  20. Offline

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    (Original post by undertaker1)
    have u done all the past papers?
    yep

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