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  1. M

    A level Biology: Post your doubts here!

    IF YOU R ASKING FOR FULL EXPLAINATION then:- You could refer to this image http://img.tfd.com/ggse/98/gsed_0001_0019_0_img5180.png Or writre -Oh from Termina -COOH (carboxylic group) and H from Amine group (NH2) Combine to produce water and C links With N. Refer to diagram if you dont understand :p!
  2. M

    A level Biology: Post your doubts here!

    I will try.. The first pathogen was free in Blood so easier to vaccinate against , second one is hidden in RBC. The second one will have More parasites, hard to kill them all :p Vaccination of second one would not prevent Liver damage (lastt one is is from M.S :p) And ofcourse you could write in...
  3. M

    A level Biology: Post your doubts here!

    Np :) ! Yes just read question twice to make Sure :P
  4. M

    A level Biology: Post your doubts here!

    I hate these questions!! Usually they carry alot of marks too :(!
  5. M

    A level Biology: Post your doubts here!

    238 *3=714 Each amino acid= 3 Nucleatides :P
  6. M

    A level Biology: Post your doubts here!

    I dont get ur question :P but Each amino acid = 3 Nucleotide!
  7. M

    A level Biology: Post your doubts here!

    Its Worth 5 Marks.. U cant Finish it this way.. Atleast i wont..! :P
  8. M

    A level Biology: Post your doubts here!

    I will try.. :p In Sickel Cell anaemia Glu is replaced with val. ( u shuld know this) If u look at Previous Part Glu is CTC.. And Val is CAC.. i chose this because they asked for One base substitutions. No coming to the answer.. A change is DNA triplet is a mutation which is cause By...
  9. M

    A level Biology: Post your doubts here!

    ok :P Shukran bro
  10. M

    A level Biology: Post your doubts here!

    Gd.. So sucrose moves Into companian by active transport or difusion?
  11. M

    A level Biology: Post your doubts here!

    It asks Why we dont see any symptoms.. It is because when Haemoglobin has Higher affinity for Oxygen.. Oxygen transport is reduced causing Body to produce more Haemoglobin.. so we cant see any symptops.. because body compensates :)
  12. M

    A level Biology: Post your doubts here!

    Which Proteins? Histones? if yes : Histones Basically help in Packaging of DNA! These are proteins that DNA wraps around so the DNA can be more condensed. During mitosis, the DNA has to be very tightly compacted into mitotic chromosomes so at the end of mitosis, the sister chromatids can be...
  13. M

    A level Biology: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_w08_qp_2.pdf Q4 )a) Its easy But i need a Model ans! :P
  14. M

    A level Biology: Post your doubts here!

    There could me more than one code for Amino acid. Because There are 4 bases ( A-T-C-G) on DNA and 3 bases are required to form an aminoacid (triplet) so 4^3=64 possible combination for 20 essential amino acids in Human Body :)!
  15. M

    A level Biology: Post your doubts here!

    No it doesnt.. Plz recheck :)!
  16. M

    A level Biology: Post your doubts here!

    The sap has many functions, including storage of useful materials, and provides mechanical support for plants.
  17. M

    A level Biology: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w13_qp_22.pdf Q2 b)ii) I need a Model Ans! :) Thnx in Advance! :) Karim Nabil!!
  18. M

    A level Biology: Post your doubts here!

    Hahah..! Nahi Bayzti Nahi Kar raha Tha! :P!
  19. M

    A level Biology: Post your doubts here!

    Lol! Sir Toh Ap Hein Hamare! :P
  20. M

    A level Biology: Post your doubts here!

    (y)(y)(y)(y)(y)! Kafi Ache Notes BANAI Hain..! Lekin Abhi inhe Yaad Karo ! :P
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