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    (Original post by maxross)
    Isn't amylase a protein though?
    yes , thats why biuret was positive. I remember it being on the practice MCQs OCR published a while back
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    (Original post by Black Rose)
    What did everyone write for the structure of blood vessel question?
    The artery wall is too thick for diffusion to occur, whereas capillaries are only 1 cell thick so short enough diffusion distance
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    (Original post by maxross)
    The artery wall is too thick for diffusion to occur, whereas capillaries are only 1 cell thick so short enough diffusion distance
    exactly my answer
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    (Original post by hashman)
    exactly my answer
    i put that collagen is thick and insoluble therefore the O2 would not be able to diffuse out of it, but that the capillary wall is perforated allowing small molecules such as O2 to move out under high hydrostatic pressures - is that wrong?
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    (Original post by nadeu01)
    Anyone know what the awnser to that weird ass plasmodium and erythrocrytes question was?
    I wrote something about how it is indirectly transmitted through a vector,e.g.mosquito and that it is injected into the bloodstream lolol probably wrong
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    (Original post by indrx__)
    Yes i wrote about IVF aswell, think it is wrong though as everyone else is saying something else :/
    Really why?
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    (Original post by Astro_Joe)
    Yeah, I believe the answer to that question was D because the biuret test should've been successful, and the benedicts and starch tests should have also been successful (but all only within the membrane.)
    But isnt starch broken down into maltose which then diffuses out
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    (Original post by wojiaoshakira)
    I wrote something about how it is indirectly transmitted through a vector,e.g.mosquito and that it is injected into the bloodstream lolol probably wrong
    I said that too. I don't think it was wrong.
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    I got b because for the cytoplasm there was starch and amylase. The starch appeared in the iodine test but that was a tick for all of them. The amylase is an enzyme which is a protein and so should appear in the bruirets test. So u can cross out d and c. For a and b they were both the same except for b had a tick for the bruiret test and a didn't for the tissue fluid. It is b because although the starch would have been broken down my the amylase to make maltose it is a biological catalyst and so would not get used up so it should still appear in the buiret test. Therefore he answer is b. Hope this helped c
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    (Original post by oni176)
    I said that too. I don't think it was wrong.
    I said that viruses need DNA in the host cell inorder to survive and reproduce - there is no DNA in a red blood cell.
    Plasmodium is in the red blood cell so it is protected from the bodies immune response by the antigens on the surface of the red blood cell so it can survive and reproduce otherwise it would be broken down by phagocytosis as its own antigens would be recognised as foreign.
    idk about it feeding off stuff in the red blood cell, might be right but this concept is definitely correct but i am unsure about if this is what they were looking for
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    By the sounds of it everyone has some similar answers and may vary so that sounds good! lower grade boundaries!
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    (Original post by rayytbh)
    I got b because for the cytoplasm there was starch and amylase. The starch appeared in the iodine test but that was a tick for all of them. The amylase is an enzyme which is a protein and so should appear in the bruirets test. So u can cross out d and c. For a and b they were both the same except for b had a tick for the bruiret test and a didn't for the tissue fluid. It is b because although the starch would have been broken down my the amylase to make maltose it is a biological catalyst and so would not get used up so it should still appear in the buiret test. Therefore he answer is b. Hope this helped c
    I got this, though I'll admit a little bit more guesswork was involved than in yours
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    (Original post by abxo)
    I said that viruses need DNA in the host cell inorder to survive and reproduce - there is no DNA in a red blood cell.
    Plasmodium is in the red blood cell so it is protected from the bodies immune response by the antigens on the surface of the red blood cell so it can survive and reproduce otherwise it would be broken down by phagocytosis as its own antigens would be recognised as foreign.
    idk about it feeding off stuff in the red blood cell, might be right but this concept is definitely correct but i am unsure about if this is what they were looking for
    I said that the virus attacks the cells to prevent immunisation to occur and the plasmodium bacteria allows the anopheles female mosquito to enter the blood stream and be used for warmth and feeding as well as harming the host cell, classified as indirect transmission with an intermediate (vector). Hopefully I'll get at least 1/3.
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    (Original post by James3000117)
    I got this, though I'll admit a little bit more guesswork was involved than in yours
    I kinda just eliminated the letters by doing that. I do think it deserved more marks tho x
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    (Original post by Jitesh)
    Pretty sure you would know from GCSE Chemistry though?
    It's also in the Pearson textbook I believe
    I had neither the revision guide or the Pearson textbook so I relied on the spec
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    Ahhh Charlotte pppppp
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    (Original post by rayytbh)
    I got b because for the cytoplasm there was starch and amylase. The starch appeared in the iodine test but that was a tick for all of them. The amylase is an enzyme which is a protein and so should appear in the bruirets test. So u can cross out d and c. For a and b they were both the same except for b had a tick for the bruiret test and a didn't for the tissue fluid. It is b because although the starch would have been broken down my the amylase to make maltose it is a biological catalyst and so would not get used up so it should still appear in the buiret test. Therefore he answer is b. Hope this helped c
    I put that but I thought of amylase as an extracellular enzyme so might diffuse out after a while maybe?
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    (Original post by habibtii)
    I wrote the zoo should create an ex situ conservation.
    for the cell thing I picked prophase. for W I wrote some random ******** answer :^)
    i tlake dabout CITES -_-
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    (Original post by alevelyh)
    i tlake dabout CITES -_-
    sad times
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    For Zoo conservation I wrote - encourage visitors not to buy palm oil products palm oil is used in many shampoos and other toiletries and the production causes the deforestation of the rhinos habitat
 
 
 
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