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  1. KurayamiKimmi

    AS Physics P1 MCQs Preparation Thread.

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w06_qp_1.pdf Qno 21 please --the answer is D but whiii D:
  2. KurayamiKimmi

    AS Physics P1 MCQs Preparation Thread.

    Pwease help !! http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s06_qp_1.pdf Q no 12 --why is the answer A ?
  3. KurayamiKimmi

    AS Biology P1 MCQs Preparation Thread

    oooh thanks!^^
  4. KurayamiKimmi

    AS Biology P1 MCQs Preparation Thread

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_s06_qp_1.pdf q no 30 -the ans ic C i dont need help in explaining-the logic behind-the answer but simply how the calculation is done i get 0.04 s and when u divide it by 0.6 u get 0.07...
  5. KurayamiKimmi

    AS Biology P1 MCQs Preparation Thread

    thanks ^^
  6. KurayamiKimmi

    AS Biology P1 MCQs Preparation Thread

    okazaki fragments??:confused: i kinda understand what ur getting at but could u explain this term?
  7. KurayamiKimmi

    AS Biology P1 MCQs Preparation Thread

    http://www.xtremepapers.com/papers/...and AS Level/Biology (9700)/9700_s03_qp_1.pdf can any1 pls explain question no 30 ^_^ http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_s04_qp_1.pdf can anyone explain qno 23 too please =/
  8. KurayamiKimmi

    AS Biology P1 MCQs Preparation Thread

    for q no 24 it says 20% are cytosine each cytosine base pairs with a guanine base so that means there are 0 % guanine bases too . this gives us 40% of the bases (C+G[20+20]) 100%-40% =60% 60% are thymine and adenine since one thymine pairs with one adenine the 60% is equally divided between A...
  9. KurayamiKimmi

    AS Biology P1 MCQs Preparation Thread

    for 23- There are 6000 nucleotides on a double stranded DNA -only one strand is transcripted by mRNA so we have 3000 nucleotides each nucleotide has one nitrogenous base -Adenine/Cytosine/Guanine/Thymine an amino acid is coded for by three N bases -so using ratio method No of amino acids...
  10. KurayamiKimmi

    AS Biology P1 MCQs Preparation Thread

    yes meiosis results in genetic variation-because you inherit one from the mother and the other from the father. oh and also because of the crossing over of non-sister chromatids in meiosis
  11. KurayamiKimmi

    AS Biology P1 MCQs Preparation Thread

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_s03_qp_1.pdf can any1 pls explain question no 30 ^_^
  12. KurayamiKimmi

    AS Physics P1 MCQs Preparation Thread.

    Well i would certainly like to try those out -are there any links to books like those ?
  13. KurayamiKimmi

    Repeat or No repeat ?

    what i know is that u can get A+ in other subjects if you havent repeated them-but wont get an A+ in the repeated subject .So tell me , was the A star that they got IN the subject that they repeated ?
  14. KurayamiKimmi

    Repeat or No repeat ?

    dude -what this means is that you can get an A+ if you take the individual oct-nov or individual may-june , not that you can take both oct nov and may june and still expect a A+
  15. KurayamiKimmi

    Repeat or No repeat ?

    wait ---havent seen it yet :p
  16. KurayamiKimmi

    Repeat or No repeat ?

    oh yea ? show me too then
  17. KurayamiKimmi

    A level Biology: Post your doubts here!

    they have nitrogen fixing bacteria in their nodules called Rhizobium which convert the nitrogen into NH4+ for the plants to use They do this under anaerobic conditions so the plant regulates a protein called legahaemoglobin in the root nodules where the bacteria live , coz this protein...
  18. KurayamiKimmi

    Physics: Post your doubts here!

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s06_qp_2.pdf someone pretty please help me out with question no 2-c-ii ^_^
  19. KurayamiKimmi

    A level Biology: Post your doubts here!

    as for c Lysosomes fuse with the phagocytotic vacuole and then secrete hydrolytic enzymes that catalyse the breakdown of either the bacterial murein which makes up the cell wall -or by catalysing the breaking down its DNA
  20. KurayamiKimmi

    A level Biology: Post your doubts here!

    for question b Bacteria have proteins on their cell surface membrane which are identified as antigen/foreign by the phagocyte's receptor -glycocalyx acts as receptor . The phagocyte then flows around the bacteria or sticks to it by binding to its antigens and thus engulfs the bacteria into a...
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