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  1. E

    Biology Paper 52 Discussion

    pigment S absorbed light of short wavelength (i think it was 490nm)..advantage was that more light will penetrate through the epidermal cells and palisade cell walls of the leaf so pigment will recieve more light
  2. E

    Biology Paper 52 Discussion

    ye chi squared was 1.25 and hence diff was not significant/null hypothesis not rejected... does anyone know the advantage of using two different solvents for chromatography?
  3. E

    Biology Paper 52 Discussion

    i wrote give same mass of food to all until adults...
  4. E

    Biology Paper 52 Discussion

    Yep observe under misroscope!
  5. E

    Biology Paper 52 Discussion

    it was strain B pigment S. looking at the position of the missing pigment (pigment 4), it showed that it was close to solvent front of 1 and far from solvent front of 2 Rf value = distace moved by pigment/ distance moved by solvent...so solvent 1 Rf value should be large and for solvent 2...
  6. E

    Biology P4 nv 2011

    I know the exam is over but does anyone know the answer to this question?
  7. E

    Biology P4 nv 2011

    yeaa same...varient 42
  8. E

    Biology P4 nv 2011

    difficult!!! the format was so different from past papers and they had soo many conceptual questions :(
  9. E

    A2 Biology - help please

    Another question: In Photosynthesis, what determines if Cyclic or Non-cyclic phosphorylation is going to occur? Also, when Cyclic phosphorylation occurs, no reduced NADP is produced. As calvin cycle requires reduced NADPH, how would it continue if there's no reduced NADP?
  10. E

    still any chance for an A*

    To get an A*, you need an overall A (so you are half way there) and an above 90% in A2 ONLY so don't repeat physics. Just work hard in A2 physics. You don't get an A* for 90% overall. Only the A2 units count towards the award of an A*. Even if you get 100% in your AS units and you get 89% in...
  11. E

    A2 Biology - help please

    Thanks! (:
  12. E

    A2 Biology - help please

    Energy and Respiration Sources on internet say that ONE GLUCOSE MOLECULE produces 38 ATP MOLECULES. Wouldn't that be wrong as during the glycolysis stage, a glucose molecule is split into TWO PYRUVATE MOLECULES and as we see, only ONE PYRUVATE MOLECULE moves on to further steps of respiration...
  13. E

    for repeating a subject

    There's many forums online where people claim that they have contacted the British Council regarding the A* grade and this is what they have said. But you should still contact them and confirm it for yourself if the information is correct.
  14. E

    for repeating a subject

    You're welcome (:
  15. E

    for repeating a subject

    Because as I said above, your overall A-levels grade maybe even 95% but unless you get 90% in your A2 course, you will not get an A* Requirements for A* 1. +90% in your A2 COURSE ONLY! 2. Your overall mark has to be +80%
  16. E

    for repeating a subject

    To get an A*, you need an overall A and an above 90% in A2 ONLY so don't repeat maths. Just work harder in A2 maths. You don't get an A* for 90% overall. Only the A2 units count towards the award of an A*. Even if you get 100% in your AS units and you get 89% in your A2 ones, it isn't enough for...
  17. E

    Private Candidate - Please help

    i have given my AS level in may/june 2011 as a regular through a college and i wanna give my A2 biology in nov/oct 2011 as a private candidate. I'd be very helpful if someone could tell me the process of applying as a private candidate. I have already sent in the form to british council from...
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