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  1. D

    A level Biology: Post your doubts here!

    Is it D..?
  2. D

    A level Biology: Post your doubts here!

    What will be the exact order?
  3. D

    A level Biology: Post your doubts here!

    Metallic9896 are you able to manage time? I tend to complete the paper exactly on time.. And tomorrow we also have to shade, so i am really scared on the time part : p
  4. D

    A level Biology: Post your doubts here!

    Thanks!!!(y)(y)
  5. D

    A level Biology: Post your doubts here!

    Perfect!(y)(y)
  6. D

    A level Biology: Post your doubts here!

    Unable to fully understand this... ans D
  7. D

    A level Biology: Post your doubts here!

    so what are the sizes we are supposed to learn from chapter 1? plant cell 40um Animal 5 to 40um cell membrane 7nm ribosome 25nm centriole 200nm prokaryote 0.5-5um virus 20-300nm Thats all?
  8. D

    A level Biology: Post your doubts here!

    Exactly! i selected "2 only". But yeah, i get the way it works now. Thanks (y)
  9. D

    A level Biology: Post your doubts here!

    can't understand statement 3..
  10. D

    A level Biology: Post your doubts here!

    I just can't thank you enough for how much you have helped me with my exams!! You explained this better than the book! :p THANKS A LOT !!!!(y)(y)
  11. D

    A level Biology: Post your doubts here!

    So in our book, There is section from page 168 to 171 (Mary Jones 4th edition, Haemoglobin, Bohr shift, CO2 Transport), no matter how much i learn and try to understand this, I basically always end up doing the 1-3 questions asked from this topic, wrong. I have attached example Qs.. If anyone...
  12. D

    A level Biology: Post your doubts here!

    That's a perfect answer :p Some information that i did not know.
  13. D

    A level Biology: Post your doubts here!

    Haha what a co incidence that we decided to ans. the same Q :p
  14. D

    A level Biology: Post your doubts here!

    I think B refers to killer T cells. The killer T cells DO leave the blood to reach infected cell (i mean how else can it reach an infected cell?) to attach to it and release toxins. A is definitely incorrect as it states the T-lymphocytes are only found in blood.
  15. D

    Chemistry: Post your doubts here!

    Q 27) 5 possible oxidation products will contain groups this way.. acid & alcohol acid & acid acid and aldehyde alcohol and aldehyde aldehyde and aldehyde This equals to acid and aldehyde both being used 4 times each. Q10) As the question states Mn2+ (product) Catalyses the reaction, so rate...
  16. D

    Chemistry: Post your doubts here!

    Q22) C-Br bond longest and weakest (Br atomic radius largest) so C-Br bond will be the first to undergo homolytic fission. Q26) You said it yourself, "ketone"... The product shown in A is not ketone, but an aldehyde. Ketone would be CH3COCH3.
  17. D

    Chemistry: Post your doubts here!

    Solve for each equation. I will only show for D, which is the right answer. Initial moles of P = 2 mol mol at equilibrium of R = x so for equation D, mol at equilibrium of P = 2 - x mol at equilibrium of Q = x/2 Sum of all mol at equilibrium expressions x+(2-x)+(x/2) Simplifies to [2+(x/2)]...
  18. D

    Chemistry: Post your doubts here!

    N-N bond breaks as it is very weak (energy 160 Kj/mol). NF2 is the single product. Statement 1 is incorrect. Statement 2 is correct as 160 is the energy of the bond that breaks. Molecules non linear as a lone pair present on N of NF2
  19. D

    Chemistry: Post your doubts here!

    Thanks! March 2017 P1 for you all :)
  20. D

    Chemistry: Post your doubts here!

    Help in both please! Also if you guys need March 2017 p1, i have it.
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