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  1. R

    AS Biology P1 MCQs Preparation Thread

    do the processes exocytosis and endocytosis require energy or not? and do proteins travel by exocytosis out of cells and endocytosis into cells?
  2. R

    AS Biology P1 MCQs Preparation Thread

    do the processes exocytosis and endocytosis require energy or not? and do proteins travel by exocytosis out of cells and endocytosis into cells?
  3. R

    AS Physics P1 MCQs Preparation Thread.

    but the graph shows a decreasing gradient.
  4. R

    AS Physics P1 MCQs Preparation Thread.

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s03_qp_1.pdf in qs 3 the resultant is the line joining the two vectors and completing the triangle, or is the line coming from the middle of the vectors. Are both of these the...
  5. R

    AS Biology P1 MCQs Preparation Thread

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_w10_qp_11.pdf need help in 18,22,16,14,2,5
  6. R

    AS Biology P1 MCQs Preparation Thread

    can u tell the different formulas to calculate tidal volume and ventilation rate and breathing rate? and what is the difference between tertiary and quaternary structure and what do hydrophobic interactions do?
  7. R

    AS Biology P1 MCQs Preparation Thread

    thnx ill check it out. can u also tell me the different formulas to calculate tidal volume and ventilation rate and breathing rate?
  8. R

    AS Biology P1 MCQs Preparation Thread

    the elastic fibres and elastin that the alveoli contain are they both the same thing in the alveoli. do they both have the funtion of stretching and recoiling the arterioles >?? another thing does anybody has a good explanation of the meselson Dna experiment in which they put DNA in caesium...
  9. R

    AS Biology P1 MCQs Preparation Thread

    right ty
  10. R

    AS Biology P1 MCQs Preparation Thread

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_s05_qp_1.pdf qs 5) the sucrose solution is 0.25 so its almost dilute so wouldnt water go into the mitochondria and cause it to burst because of excess water?
  11. R

    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 qs 9) tell how to do it
  12. R

    AS Physics P1 MCQs Preparation Thread.

    ok so across X if we are to find the p.d we take the whole line then right? and its a series circuit right not a parallel one?
  13. R

    AS Physics P1 MCQs Preparation Thread.

    http://www.xtremepapers.com/papers/...and AS Level/Physics (9702)/9702_s06_qp_1.pdf how do we do q33. is the circuit parallel?
  14. R

    AS Physics P1 MCQs Preparation Thread.

    http://www.xtremepapers.com/papers/...and AS Level/Physics (9702)/9702_s06_qp_1.pdf how do we do q33. is the circuit parallel?
  15. R

    AS Physics P1 MCQs Preparation Thread.

    well when they will strike inelastically some of their K.e will be converted to other forms so shouldnt they seperate with less speed??
  16. R

    AS Physics P1 MCQs Preparation Thread.

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s06_qp_1.pdf how do we do q33. is the circuit parallel?
  17. R

    AS Physics P1 MCQs Preparation Thread.

    so in inelastic it the speed of seperation will be less then ???
  18. R

    AS Physics P1 MCQs Preparation Thread.

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s06_qp_1.pdf In qs 11, whenever an elastic collision occurs the relative speed of approach will be equal to the relative speed of seperation. this only applies to elastic collsions or...
  19. R

    AS Physics P1 MCQs Preparation Thread.

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w07_qp_1.pdf in 37) why is neutron number not conserved. and from previous questions which asked the same thing it said charge was not conserved. help plz
  20. R

    AS Physics P1 MCQs Preparation Thread.

    ohhhhhhhhhh. i get it now :love:
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