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  1. xtremeforums

    biology paper 1 doubts

    hmmm. but doesnt the cholestrol just maintain the rigidity. How is increasing it going to increase the fluidity? i chose glycolipids. The lipid tail could be an unsaturated fatty acid chain, therefore increasing the kinks and the fluidity... no..?
  2. xtremeforums

    biology paper 1 doubts

    yupp..
  3. xtremeforums

    biology paper 1 doubts

    I dont know if this question has been discussed here before or not, Increasing which component increases the fluidity of the membrane? I was confused between cholestrol or glycolipids. What did u all choose?
  4. xtremeforums

    biology paper 1 doubts

    i think it shouldve been the h bonds stabilizing the membrane. Thats done by the glycolipids and glycoproteins. And i dont know why so many people think that glycolipids and glycoproteins are part of the phospholips.. :confused: They are different distinct structures..
  5. xtremeforums

    biology paper 1 doubts

    atherosclerosis can cause a heart attack too, if the thrombus is in a coronary artery.
  6. xtremeforums

    biology paper 1 doubts

    the option ddnt say "fatty acids" it said fatty deposits or something like that. And yes, they do get deposited in the arteries and veins, which narrows the diameter of the blood vessel (possibly the coronary artery) therefore reducing the blood supply (oxygen and nutrients) to the heart...
  7. xtremeforums

    biology paper 1 doubts

    The GT is not made taking into consideration the average students. Cambridge gives 10% of its highest scorers an A...
  8. xtremeforums

    biology paper 1 doubts

    Its not about the Cambridge being lenient or not, it depends on the body of students giving that paper. There might be thousands of other people, not on the forums, who gave this exam and found it relatively more difficult than u did. November thresholds are usually lower than June thresholds...
  9. xtremeforums

    biology paper 1 doubts

    How many mistakes have you all made? (out of the ones we've discussed) That could give us a more accurate grade threshold for this paper...
  10. xtremeforums

    biology paper 1 doubts

    For the phospholipid question: i chose D forms H bonds with water to stabilise the membrane...
  11. xtremeforums

    biology paper 1 doubts

    telophase..
  12. xtremeforums

    biology paper 1 doubts

    For the equilibrium question: The answer should be facilitated diffusion, osmosis, and diffusion. Because these occur due to random movement until equilibrium is reached. Active transport, on the other hand, doesnt cause an equilibrium to be reached. Volume of oxygen to be calculated was 325...
  13. xtremeforums

    Biology Paper 1

    Candidates who did biology 12, please vote here... http://www.xtremepapers.com/community/threads/biology-paper-1-doubts.20936/page-17#post-414973
  14. xtremeforums

    HOW WAS BIOLOGY PAPER 12 ?

    i was expecting a much more difficult paper. I finished wayyy before time.. GT would most prob be around 35 though.
  15. xtremeforums

    HOW WAS BIOLOGY PAPER 12 ?

    I'm afraid the grade threshold would be high...
  16. xtremeforums

    biology paper 1 doubts

    The paper was pretty easy... with maybe one or two tricky questions. I'm afraid the grade threshold would be high for this paper! Coz apparently alot of people found it easy... Discussion after 24 hours!! Only then we'd know what the threshold would actually be :p
  17. xtremeforums

    biology paper 1 doubts

    Because prokaryotes divide by binary fission not mitosis...
  18. xtremeforums

    biology paper 1 doubts

    Which question do u think is wrong?
  19. xtremeforums

    biology paper 1 doubts

    InshAllah!
  20. xtremeforums

    biology paper 1 doubts

    U helped alot, thanks! and good luck to u too... And what ur saying makes sense, thats why i was confused..o_O Oh well, ive a strong feeling that it wont come in the exam tomorrow... (y)
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