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  1. R

    A level Biology: Post your doubts here!

    PLease explain what is the primary structure of protein is?
  2. R

    Post Your AS LEVEL PHYSICS PAPER 2 DOUBTS

    http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s10_qp_21.pdf In5c) The arrows will be left and right or up and down? And why didnnt we take cos to resolve.
  3. R

    Post Your AS LEVEL PHYSICS PAPER 2 DOUBTS

    9.81 unless its written to take it as 10
  4. R

    Physics: Post your doubts here!

    So in couple the arrows will always be parrallel u say?The arrows will be left and right or up and down.And why didnnt we take cos to resolve.
  5. R

    Physics: Post your doubts here!

    what is the difference b/w path diff and phase diff??
  6. R

    Physics: Post your doubts here!

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s10_qp_21.pdf 5c) The arrow will be pointed up and down in a somewat curved direc. yes? Why are we resolving the distance. why cant we take out the answer without resoolving the distance?
  7. R

    A level Biology: Post your doubts here!

    do u know which sizes to learn. can u note dem down plzz
  8. R

    A level Biology: Post your doubts here!

    hmmm ok
  9. R

    A level Biology: Post your doubts here!

    Also do we have to learn the sizes of all the different structrues such as cell surface membrane etc.
  10. R

    A level Biology: Post your doubts here!

    But in vaccination sometimes a live virus is used as well. And its apparently the most effective form of vaccination so why?
  11. R

    Physics: Post your doubts here!

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s10_qp_21.pdf 2(iii) Shouldnt the line be straight b/c air resistance negligible, so distance travelled would be constant, b/c same 9.81 acceleration?
  12. R

    A level Biology: Post your doubts here!

    Why does vaccination help in making us immune against a disease. If the disease strikes us later we will still produce antibodies to destroy them, so what is the use of vaccination?
  13. R

    A level Biology: Post your doubts here!

    what is bacterial cell wall made out of?
  14. R

    Post Your AS LEVEL PHYSICS PAPER 2 DOUBTS

    Man u awsum :)))
  15. R

    Post Your AS LEVEL PHYSICS PAPER 2 DOUBTS

    S05 : 4c,6iv,5iii & c W05: 4 s06: 2b,5c S07:5c No7: 1b,4b, c & d Any help wud be greatly appreciated. PLease post as soon as possible ty :)))
  16. R

    Post Your AS LEVEL PHYSICS PAPER 2 DOUBTS

    oh ty
  17. R

    A level Biology: Post your doubts here!

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_s06_qp_2.pdf In qs 4a) The length 0.5um is not specified, so how do we know its the length of the chloroplast. And why dont we take the width of the entire micrograph rather than the...
  18. R

    Physics: Post your doubts here!

    i think if the forces equalled he would be travelling with constant velocity no?:p
  19. R

    Physics: Post your doubts here!

    Man i had solved everything. Just the part: So R = 0.489 ± 0.009 cm. i dont get how u get 0.009 cm in your answer. That is the only step i dont understand so plzz explain how u wrote it thnx
  20. R

    Physics: Post your doubts here!

    http://www.xtremepapers.com/papers/...and AS Level/Physics (9702)/9702_w07_qp_2.pdf how do we do 1b. really confused helpp
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