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  1. L

    AS Biology P1 MCQs Preparation Thread

    1 is wrong because when mitosis occurs the Tissue or organ As a whole is repaired but the cell itself is not repaired. The question says Can divide by mitosis to repair ITSELF.
  2. L

    AS Biology P1 MCQs Preparation Thread

    When number of unsaturated phospholipid molecules increase the fluidity of membrane increases . Thats as far as im sure. I think when fluidity increases it is easier for exocytosis to take place.
  3. L

    AS Biology P1 MCQs Preparation Thread

    To get BEST ESTIMATE OF ENZYME ACTIVITY the ; 1.enzyme must be present, 2.its substrate must be present 3.No inhibitor must be present. If above 3 conditions are set the highest possible rate of reaction of an enzyme can be determined. If the blood is sterilised obviously the enzyme will be...
  4. L

    AS Biology P1 MCQs Preparation Thread

    Permeability is whether a substance is ALLOWED TO ENTER OR EXIT through a membrane. Since Cell wall is FULLY permeable( OL biology :P ) it allows ANYTHING TO PASS THROUGH IT. Whereas a cell membrane is PARTIALLY PERMEABLE which means of selective substances can enter and leave cell through...
  5. L

    AS Biology P1 MCQs Preparation Thread

    There is an answer sheet www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_w02_er.pdf Remember Examiners report always have paper 1 answers :D
  6. L

    AS Biology P1 MCQs Preparation Thread

    Water is like a government soldier it comes in to cells and leaves as it likes to ... in a turgid plant cell it is practically 'full' of government soldiers so no room for extra soldiers so the soldiers are RESTRICTED to enter the cell. But at first the water enters the cell through cell wall so...
  7. L

    AS Biology P1 MCQs Preparation Thread

    Prokaryotes do not have a nucleas therefore it cannot undergoe mitosis ( no nucleas = no nuclear division which is mitosis )
  8. L

    AS Biology P1 MCQs Preparation Thread

    Netproduvctivity = respirationenergy/light energy * 100% i.e 5000/1000000 * 100 % = 0.5% :D
  9. L

    AS Biology P1 MCQs Preparation Thread

    THats easy .. water always enter the cell by osmosis (because its fresh water it has high water potential ) but in plants the cell becomes turgid and then cell wall pushes outwards and therefore no more water can enter the plant so , the cell wall actually restricts flow of water into the cell...
  10. L

    How to calculate Uncertainties for practical

    The topic says it all Is uncertainty half the minimum reading on a instrument or is it THE minimum reading on the instrument ????
  11. L

    ANy predictions on type of practical going to come for AS level Physics?? Not precise, just general

    I have a guess that a spring practical will come ... like to find gravitation force by oscilatting the spring coz thats the only kind of practical our teacher did at last day of school O_o
  12. L

    PHYSICS P22: How was it?

    Other than velocity time graph im prettysure of everything else :D Time was not enough for double re check :/ ...
  13. L

    As physics

    GL to all today :)
  14. L

    How was your biology paper 22? I am so sad and devastated.

    It was very easy :P I wrote phosphodiester bond :D yipeee i get one mark ...
  15. L

    AS Physics P22 Related.

    Its good enough.. past paper practice is needed only to know HOW to write and answer not WHAT the answer is. As long as that person has adequate knowledge about any question he sees its good enough. :)
  16. L

    Biology Paper 22 ( How was it? )

    Expecting around 45 hope GT is 43 like
  17. L

    CIE AS Level Physics Specimen Paper MJ 2012

    what i think is specimen papers come only when there is a change in structure or syllabus of the subject. So no specimen paper for2012 :) I may be wrong ....
  18. L

    guys biology paper 2 is on 29 of may ...i need some help

    I have HUGE feeling that haemoglobin dissociation curve willbe coming :( I had the same HUGE feeling about two particles on two strings will come for P42 Mechanics and it actually came :(
  19. L

    As physics

    You forgot luminous intensity as Candela under base units :P Ty for the share
  20. L

    guys biology paper 2 is on 29 of may ...i need some help

    1ST question was about catalase and hydrogen peroxide. We dip some filter paper (1cm *1 CM) in different concentrations of catalase(which we should prepare) and put the papers in hydrogen peroxide and see how long it takes for it to come back up. We keep repeating this for all concentraions...
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