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    how was the multi choice question about the food going from stomach to small intestine true? because food is absorbed into small intestine through the bloodstream and not directly from the stomach
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    (Original post by shania.d.f)
    A codon has three bases and one codon makes up one amino acid. So, it would make sense to do 630*3. Honestly, I think they just said minimum to confuse students.

    Posted from TSR Mobile
    I think you're right about them confusing people - at first I started dividing because it said 'minimum' which makes you think it will be smaller. But then I realised and did 630 x 3 to get 1890. 😅
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    (Original post by bue34 c)
    how was the multi choice question about the food going from stomach to small intestine true? because food is absorbed into small intestine through the bloodstream and not directly from the stomach
    You have got it the wrong way round. Food is absorbed into the blood from the small intestine - not the other way round. So, food goes into the small intestine from the stomach and is then absorbed into the blood through the villi.
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    What did everyone put for that question about embryos and specialised cells?
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    (Original post by ca.hardy)
    You have got it the wrong way round. Food is absorbed into the blood from the small intestine - not the other way round. So, food goes into the small intestine from the stomach and is then absorbed into the blood through the villi.
    Oh thanks, damn it stupid mistakes
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    Yeah, you had to times 630 by 3
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    (Original post by htkta)
    What did everyone put for that question about embryos and specialised cells?
    I said through differentiation after the 16 cell stage
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    (Original post by bue34 c)
    Oh thanks, damn it stupid mistakes
    Don't worry, I think edexcel purposefully wanted to trick students based on some of the questions on that paper. I think the boundaries will be reasonable, hopefully anyway.
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    (Original post by bue34 c)
    I said through differentiation after the 16 cell stage
    Yeah, I mentioned differentiation too. But I also talked about embryonic stem cells?
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    (Original post by htkta)
    Yeah, I mentioned differentiation too. But I also talked about embryonic stem cells?
    Yh thats sounds right, what did you put for the question that asked you to explain the differences in the tubes? i referred to the ph but not entirely sure if thats right
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    (Original post by bue34 c)
    Yh thats sounds right, what did you put for the question that asked you to explain the differences in the tubes? i referred to the ph but not entirely sure if thats right
    Which question was that?
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    (Original post by htkta)
    Which question was that?
    i think it was with the yeast experiment question
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    (Original post by bue34 c)
    i think it was with the yeast experiment question
    I have no idea. I can't remember what I put, but I remember I used the figures on the table and made something up!!
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    (Original post by keepyourapology)
    17, cuz it should have been less than the other two. I put 20 but Idk who's right.
    Its 42 because the table showed that as the pH decreased by 2, the (whatever it was) increased by 7 (I think it was 7). So it looked like this:

    pH: Sugar: (Whatever it was)
    9. fructose. 28
    7. fructose. 35
    5. fructose 42. ----> this is the answer you should have got - the question was testing our ability to notice trends.
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    (Original post by htkta)
    I have no idea. I can't remember what I put, but I remember I used the figures on the table and made something up!!

    Oh ok
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    If people can give me the questions and your answers i will help aswell.

    Question 1 (Bacterial/Yeast Cell) :
    Part (a):(yeast cell)• has a nucleus (1)• does not have a flagellum(1)• does not have a plasmid(1)• has a vacuole(1)(bacterial cell)• has chromosomal DNA /circular DNA (1)• has a capsule (1)• has a slime coat (1)• does not have mitochondria (1)
    Part b : where does respiration take place in the yeast : Mitochondria.
    Part (?):17 ( pH 9 decreases the concentration )

    Question 2 (Digestion):
    Part (a):Peristalsis
    Part(b): No villi / Surface area of one cell / ...
    Part (c):The amylase in the saliva will break down the starch present in the bread to form sucrose.

    Fossils Question :
    Part(a) :D
    Part (b):
    Human Intervention
    Loss of habitat
    Climate Change
    Predators (correlate to increase in group B&C)

    DNA Extraction:
    Part(a):
    Part(b): Break up the cells to help the dna releasing from the nucleus ( Not Protease )
    Part(c):
    Part(d):
    Differences between mitosis & meiosis:
    Haploid cells vs Diploid Cells (1)
    Genetically Varied vs Genetically Identical (1)
    4 Daughter Cells vs 2 Daughter Cells (1)
    Gametes vs Body Cells
    Circulatory System:
    Part(a):Pulmonary Vein
    Part(b):De-oxygenated blood moves into the right atrium via the vena cava, moves to the right ventricle through the valves, and goes to the lungs via the pulmonary artery.
    Part(c):
    Part(d):Six marker on how the narrowing of coronary arteries affect the functioning of the heart and surrounding body cells.
    - Increased pressure - Heart and body cells have slower respiration rate - Heart problems such as cardiac arrest leading to coma - Fatigue in exercise - Smaller cardiac output

    Leaves:
    Part(a):
    Part(b):
    Part(c):Light is no longer the limiting factor, and hence, increasing the amount of light intensity will not affect rate of reaction, as some other factor is in shorter supply and is controlling the rate.
    Part (d):Six marker on movement of water in a plant. Transpiration , Osmosis through roots , water vapour entering the stomata through diffusion
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    (Original post by ca.hardy)
    Its 42 because the table showed that as the pH decreased by 2, the (whatever it was) increased by 7 (I think it was 7). So it looked like this:

    pH: Sugar: (Whatever it was)
    9. fructose. 28
    7. fructose. 35
    5. fructose 42. ----> this is the answer you should have got - the question was testing our ability to notice trends.
    Except if you looked above at the...sucrose, I think it was, you would see that the fructose answer for pH value x was always the x value for the sucrose divided by 13 to 13.2 (I believe). Using this - which uses trends and acknowledges the proportional relation of the sucrose value to the fructose value - the answer would have been 17.

    [EDIT: read ahead; I think you may be right now based on question wording. Now I think of it though, how can you notice a trend from just two values? I think the question inherently asked us to see the relationship between fructose and sucrose, not the pH trend of fructose alone.]
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    (Original post by Southwestern)
    Except if you looked above at the...sucrose, I think it was, you would see that the fructose answer for pH value x was always the x value for the sucrose divided by 13 to 13.2 (I believe). Using this - which uses trends and acknowledges the proportional relation of the sucrose value to the fructose value - the answer would have been 17.
    Didn't think they'd include a trend this intricate in a biology exam
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    (Original post by htkta)
    Didn't think they'd include a trend this intricate in a biology exam
    I agree: the "n+7" trend argued by ca.hardy seems much more fitting
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    (Original post by Southwestern)
    I agree: the "n+7" trend argued by ca.hardy seems much more fitting
    Who knows. This is all conspiracy, for all we know neither answers could be correct! Sometimes mark schemes are a little lenient.
 
 
 
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