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  1. Noor Ahmad

    A level Biology: Post your doubts here!

    Question 18, As far as i know , Semi conservative replication DOES take place in mitosis? http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_w12_qp_11.pdf
  2. Noor Ahmad

    A level Biology: Post your doubts here!

    Thank youu ! Yes it did.But don't we subtract the 1200 too? :o
  3. Noor Ahmad

    A level Biology: Post your doubts here!

    Question 39. http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_w11_qp_12.pdf
  4. Noor Ahmad

    A level Biology: Post your doubts here!

    Question 27 http://papers.xtremepapers.com/CIE/...nd AS Level/Biology (9700)/9700_w10_qp_12.pdf
  5. Noor Ahmad

    AS Biology P1 MCQs Preparation Thread

    Question 27 http://papers.xtremepapers.com/CIE/...nd AS Level/Biology (9700)/9700_w10_qp_12.pdf
  6. Noor Ahmad

    A level Biology: Post your doubts here!

    OH MY, i din't recognize the least likely part.Thanks alot :)
  7. Noor Ahmad

    A level Biology: Post your doubts here!

    Question 21 Isn't it mRNA is transcribed from the anti-sense strand? how is the answer B,isn't it supposed to be D? and question 34 isn't it bacteria can be transferred directly too? Why not cholera then...
  8. Noor Ahmad

    A level Biology: Post your doubts here!

    Question 16 and 40 could anyone explain? http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_w11_qp_11.pdf
  9. Noor Ahmad

    A level Biology: Post your doubts here!

    Oh yes,well thank you so much. which bacteria respires anaerobically? is it only dentrifying bacteria?
  10. Noor Ahmad

    Alright!

    Alright!
  11. Noor Ahmad

    A level Biology: Post your doubts here!

    So the nitrifying bacteria increase or decrease is not related to light intensity? I assumed that they increased since dust blocks light and hence no photosynthesis can take place.This reduces oxygen abundance and hence provides a suitable medium for growth of nitrifying bacteria. is that...
  12. Noor Ahmad

    No no

    No no
  13. Noor Ahmad

    A level Biology: Post your doubts here!

    Question 39 how is dust even responsible in the increase in nitrifying bacteria? http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_w07_qp_1.pdf
  14. Noor Ahmad

    A level Biology: Post your doubts here!

    Thank you so much!
  15. Noor Ahmad

    A level Biology: Post your doubts here!

    question 32, isn't it the no.of men decreasing by 60% same as the percentage of smokers decreased by 60%? http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_w06_qp_1.pdf
  16. Noor Ahmad

    A level Biology: Post your doubts here!

    Question 30 , why is it B , it can also be A right? and i don't get what's the difference in both PHs http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_w05_qp_1.pdf
  17. Noor Ahmad

    A level Biology: Post your doubts here!

    What is the effect of changing the PH above/below the optimum PH? what effect does it have on Rgroups in the active site?
  18. Noor Ahmad

    A level Biology: Post your doubts here!

    HOW DO WE CALCULATE THE RATE OF ABSORPTION OF GLUCOSE? question 2b (i) and (ii) http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_s12_qp_51.pdf
  19. Noor Ahmad

    A level Biology: Post your doubts here!

    (20x2) - 2 = 38
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