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  1. D

    Hello, Can you give us an estimate when you will post the 2013 gt's?

    Hello, Can you give us an estimate when you will post the 2013 gt's?
    • dornam
    • Profile post
  2. D

    June 2013 session - when will grade thresholds be available?

    I sent an email to CIE and they told me that they are available after the June 2013 session is over, but only on the teacher support site.
  3. D

    June 2013 session - when will grade thresholds be available?

    Hello, When will the grade thresholds be available for the June 2013 session biology?
  4. D

    A level Biology: Post your doubts here!

    Can you explain me question 25? http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_w05_qp_1.pdf I chose B, because in the symplast pathway water does move through the partially permeable plasma membranes. D is for apoplast pathway whilst A...
  5. D

    A level Biology: Post your doubts here!

    Anyone?
  6. D

    AS (Biology) P1 MCQs Preparation Thread.

    Now I have a really interesting question here. Check Q38 from here: http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_w09_qp_11.pdf Answer is C - the niche. Check Q40 from here...
  7. D

    A level Biology: Post your doubts here!

    Now I have a really interesting question here. Check Q38 from here: http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_w09_qp_11.pdf Answer is C - the niche. Check Q40 from here...
  8. D

    A level Biology: Post your doubts here!

    Why is denitrification increased in soils with little oxygen?
  9. D

    A level Biology: Post your doubts here!

    Really, really stupid of me
  10. D

    A level Biology: Post your doubts here!

    Q13: That's exactly what I said. Now look at the answer and you'll see that it should be D and it's A.
  11. D

    A level Biology: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_w10_qp_12.pdf Question 13. I have chosen D. So the concentrations of Na inside cell is low while outside is high. So Na will move against the concentration gradient through protein 2. The...
  12. D

    A level Biology: Post your doubts here!

    Can anyone explain me question 40, why are there 6 trophic levels? I chose 5. http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_w09_qp_11.pdf
  13. D

    *Biology Paper 5 tips*

    So what are the main experiments we should focus on for tomorrow? Is there any point in studying the practical booklets?
  14. D

    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 Question 37... answer is D. I put C. Can anyone explain? Question 38 - answer is C, I put B because I thought that if they belong to different food webs, they can be at...
  15. D

    A level Biology: Post your doubts here!

    Yes, it is.
  16. D

    A level Biology: Post your doubts here!

    Q19 - don't chromosome also form in prophase? Q36 - tuberculosis is an infectious disease, and I think that it is more easily transmissible from parent to son than cholera. TB does not have a vector either
  17. D

    A level Biology: Post your doubts here!

    Anyone?
  18. D

    A level Biology: Post your doubts here!

    Here is the paper: http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_s11_qp_11.pdf Can anyone explain me questions 15, 19 and 36? For question 15, the examiner report states that the cell surface membrane does not allow intracellular...
  19. D

    *Biology Paper 5 tips*

    What solution can be used as a buffer?
  20. D

    A level Biology: Post your doubts here!

    Am I right in that the question 1 papers from a year (let's say 2010 May / June, there are the papers 11, 12, 13), are actually the same ones but with another order of the questions?
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