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    (Original post by MilindS99)
    B was the temperature one, so the rate increases until 25 degrees then decreases at high temp. This did confuse me slightly so i didn't put it down. How is this proof of translocation? (i think part (a) was translocation and (b) proof of source to sink?)
    The only way I could think of this being evidence for translocation is that sucrose travelling through the apoplast pathway require a cotransport protein, at hight temps this protein may denature so therefore translocation through the apoplast pathway would decrease
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    I said for the erythrocyte question that it used them as a means of transport to find other host cells. Would that get a mark or?
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    (Original post by Yukio.X)
    The % increase was defo 98.5% 6600 dosnt make sense at all...


    Posted from TSR Mobile
    There was definitely an answer of 6600% for the increase from regular plasma to actual blood, i messed up and put 6700% because i just did the percentage of the plasma rather than the percentage increase, but it was certainly up there.
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    I put CBA and then FD
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    can anybody get the paper or like a proper unofficial mark scheme, as there are for maths exams
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    ..:L
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    It seems like a lot of people lost marks on silly mistakes, even though the paper was kinda easy. So maybe the grade boundaries will be low?

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    (Original post by Yukio.X)
    The % increase was defo 98.5% 6600 dosnt make sense at all...


    Posted from TSR Mobile
    I got 98.5% too
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    can someone try recall all the questions based upon the rhinos
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    x=cell wall
    y=plasma membrane as during plasmolysis the plasma membrane is drawn away from cell wall
    z=tonoplast/vacoule as they never made that clear so could allow either.

    The questions 21ai) was there was no consistency of sucrose concentration (from table it went from 0.4 to 0.45 where as throughout it was a difference of 0./1)
    the second answer was size\amount of potato disc was not stated or controlled.

    21aii) The question where you explain how it shows the water potential within the potato discs. You had to use the figures and explain that the percentage decreased in mass as concentration increased as concentration of sucrose increased so therefore higher water potential was in potato and by osmosis water left potato sacs(whatever they called them) resulting in decrease of mass of potato disc.

    Guanine was 28% method= 22x2=44
    100-44/2=28

    The question based upon red blood cells lacking cell content answer was: increased surface area to volume ration and therefore maximum level of 02 can be transported to respiring tissues.

    Then the one about why red blood cells never used up 02 was because they never contained double membrane bound organelles such as mitochondria which uses 02 for aerobic respiration. (dont know if im correct)

    The question about the conservation when asking about small groups were isolated advantages where:
    if a disease arise will not wipe out whole population
    isolated therefore protected from predators and human hunted rhinos.

    Another question was filling in missing gaps went in order like this : KINGDOM=ANIMALIA
    Phylum, Class, Order, Fishes, Genus, Species=(in the question it said D.S... it was to copy the s part of name)
    the second part to questions was why is binomial system helpful this was because it avoids confusion across the world when classifying species.

    Last question was= bohr effect.

    ii) active respiring tissues have lower saturation of 02 because aerobic resp. takes place releasing more co2 at faster rate which in return reacts with water to form carbonic anhydrase which then dissociates to form h+ ions causing haemoglobin to unfold as the bonds are broken such as hydrogen and ionic and 02 is released. Or active tissues have low p02 so Hhb dissociates to release 02.

    cant remember the letters for the question after.

    last question was based on mass flow. Cotransportation occurs where sap is actively loaded companion cell then diffuse through plasmodesmata, at top of sieve tube elements theres high hydrostatic pressure therefore creates a pressure gradient and moves along gradient towards sink where they are unloaded. Mention flow of sap in one direction to gain mark for mass flow.


    (DONT KNOW IF ITS RIGHT)
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    I put 98.5% but apparently that's wrong
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    (Original post by Yukio.X)
    The % increase was defo 98.5% 6600 dosnt make sense at all...


    Posted from TSR Mobile
    Yeah because an increase from 0.3 to 20.1 is only a 98.5% increase. Sure mate

    Posted from TSR Mobile
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    for the question about amylase and carbonic anhydrase, the answer was Cl- and Zn2+
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    (Original post by Yukio.X)
    The % increase was defo 98.5% 6600 dosnt make sense at all...


    Posted from TSR Mobile
    Sadly not.

    Solution:
    100\times\frac{20.1-0.3}{0.3}=6600

    If the percentage increase was 98.5%, that would mean:
    0.3 + (98.5% of 0.3). (or, 1.985*0.3)

    ...which doesn't equal 20.1

    However, if you multiply 0.3 by 6600 and divide by 100 you get 20.1.
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    (Original post by DoubleDoors)
    Sadly not.

    Solution:
    100\times\frac{20.1-0.3}{0.3}=6600

    If the percentage increase was 98.5%, that would mean:
    0.3 + (98.5% of 0.3). (or, 1.985*0.3)

    ...which doesn't equal 20.1

    However, if you multiply 0.3 by 6600 and divide by 100 you get 20.1.
    20.1 is defo right, thats what i got
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    (Original post by DoubleDoors)
    Sadly not.

    Solution:
    100\times\frac{20.1-0.3}{0.3}=6600

    If the percentage increase was 98.5%, that would mean:
    0.3 + (98.5% of 0.3). (or, 1.985*0.3)

    ...which doesn't equal 20.1

    However, if you multiply 0.3 by 6600 and divide by 100 you get 20.1.
    Is it not 6700%? Because (0.3x6600)/100 actually gives 19.8
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    That's so unfortunate literally got 0 marks for the maths questions; life sucks
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    (Original post by babyrayray)
    Is it not 6700%? Because (0.3x6600)/100 actually gives 19.8
    The formula for percentage change is:
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    I simply talked about exsitu conservation
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    (Original post by Mike1221)
    I simply talked about exsitu conservation
    Me too. I'm not sure if anyone agrees with this logic, but if captive breeding hasn't worked then in-situ conservation isn't going to work either (unless it's like a hospice for the dying species lmao).

    I mentioned the term 'ex situ' in the context of reducing poaching, with my example being that the horns could be cut off to reduce the incentive for poaching.
 
 
 
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