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  1. K

    A level Biology: Post your doubts here!

    Explain, interms of protein structure, how it is possible for each T cell receptor to bind specifically to one type of antigen. [3] Please help. Thanks :)
  2. K

    Mathematics: Post your doubts here!

    Can someone do this question please?
  3. K

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s04_qp_1.pdf Need help with Q6 please
  4. K

    Physics: Post your doubts here!

    What is the absolute uncertainty of a meter when we perform experiments in practicals?
  5. K

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s04_qp_1.pdf Need help with Q6 please
  6. K

    A level Biology: Post your doubts here!

    Thank you so much :)
  7. K

    Chemistry: Post your doubts here!

    Thank you so much :)
  8. K

    Chemistry: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s04_qp_1.pdf Please Help with Q1 and Q11
  9. K

    A level Biology: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_w07_qp_1.pdf Q15
  10. K

    A level Biology: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_w06_qp_1.pdf Please help with Q1 http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_s07_qp_1.pdf Need help for Q4
  11. K

    Mathematics: Post your doubts here!

    [/quote Thank you :)
  12. K

    Mathematics: Post your doubts here!

    How do you square an equation like this? (x^2 -2x -3) Please help
  13. K

    Mathematics: Post your doubts here!

    How to solve the inequality: x-x^3 < 0 please help :(
  14. K

    Solved Past Papers & Revision Notes for IGCSE & A level Mathematics

    How to solve the inequality: x-x^3 < 0 please help :(
  15. K

    Mathematics: Post your doubts here!

    Values of a, b and c for which the equation ax+by+c=0 doesn't represent a straight line?
  16. K

    good books for O level chemistry and physics

    For chemistry : Chemistry Matters For physics: Physics Matters and Explaining Physics
  17. K

    Biology; Chemistry; Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20O%20Level/Chemistry%20(5070)/5070_w11_qp_11.pdf The answer to Q19 is C because then nitric acid will also be formed, right?
  18. K

    Biology; Chemistry; Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20O%20Level/Chemistry%20(5070)/5070_s10_qp_11.pdf Please explain Q11
  19. K

    Biology; Chemistry; Physics: Post your doubts here!

    Thanks! :)
  20. K

    Biology; Chemistry; Physics: Post your doubts here!

    Thank you so much. :)
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