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    (Original post by triphazards)
    definitely failed. For the 2nd time fml


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    haha insure you did fine, i resat aswell, but i took a gap year instead of a third year im college, would you say it was harder than by4?
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    How do you get an A* overall? Is it 90 UMS across all A2 units, or do you need 90+ in each A2 unit?
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    (Original post by hprynne)
    How do you get an A* overall? Is it 90 UMS across all A2 units, or do you need 90+ in each A2 unit?
    across all your units 270/300 UMS
    Each exam (4 & 5) is 120 UMS each and coursework is 60
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    For the spermatogenesis/oogenesis essay, do people think they accept labeled diagrams for the processes?
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    (Original post by csdjfjlkbfdjlk)
    For the spermatogenesis/oogenesis essay, do people think they accept labeled diagrams for the processes?
    I would think so yeah.
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    Is there an unofficial mark scheme going around for either by4 or by5?
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    (Original post by wobobobob)
    Is there an unofficial mark scheme going around for either by4 or by5?
    who wants to collab to make a mark scheme ?
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    (Original post by kevin_muendo)
    who wants to collab to make a mark scheme ?
    I can't even remember the Qs 😂 Let alone any answers!
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    (Original post by Squirrel246)
    I can't even remember the Qs 😂 Let alone any answers!
    Collab by5 exam questions
    i will update, please correct any mistakes, and add any you remember

    Question titles
    1. carbon fuels and sustainability 2. cellular reproduction 3. inheritance 4.energy flow 5.ebola 6. 10 marker on spermatogenesis

    question 1.
    what is the definition of monocrop
    definition of biodiversity
    what is the definition of carbon footprint
    how does monocrop effect biodiversity
    how transporting bananas by boat will affect a companies carbon footprint

    question 2 cyanide
    which clover gene will be passed on
    di-hybrid cross
    ratio for the different phenotypes
    chi-squared test
    cross the correct significants level
    do you accept the null hypothesis
    how will cows grazing make a new species of clover

    question 3 cellular reproduction
    what is the diploid number of chromosomes
    put the stages of meiosis in order
    name the two stages
    state two structural differences
    mutation ? (stop codon something)
    name the type of mutation
    label the the new gene sequence
    why cant this make the protein

    question 4 energy flow in a ecosystem
    label the correct number in the energy flow diagram
    the percentage of the energy flow for plants
    what does this assume of the energy not used
    what does this group (decomposers) do with the energy
    what would be the difference on a woodland floor
    how would they grow differently in more acidic conditions (peat bog)

    question 5 ebola
    how can the ebola virus not need the nucleus to produce protein
    cant remember much about ebola
    ethical implications of doctors giving the vaccine except being tested
    (some questions of vectors which i cant fully remember)
    what organelle is affected by a virus
    what enzyme is used to create the RNA
    which is the vector
    which is the vector for the bacteria
    why is this vector better
    what is the final modifier of a protein

    question 6 10 marker on spermatogenesis
    A in the testes
    B in the seminiferous tubules
    C to produce haploid cells
    D spermatogonium mature to make P spermatocyte
    E meosis 1 to make secondary spermatocyte
    F meosis 2 to make spermatids
    G differentiate to make spermatozoa
    H sertoli cells
    Difference with oogonia
    -3 polar bodies
    -starts at puberty/starts at birth
    -follicle cells/ sertoli cells
    -limited number/millions
    -stops at menopause/ never stops
 
 
 
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