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  1. periyasamy

    A level Biology: Post your doubts here!

    q quartenary must be since two identical chain of 99 amino acids mean two polypeptide chains......>>>>>>than one polypeptide chain is resembling quarteary level.
  2. periyasamy

    A level Biology: Post your doubts here!

    Just think that question 9 why option c cannot is because r group suppose to be a carbon chain group but the option c is another amino acid itself. Instruction above said structure of one amino acid ,,,option c will make it to have two amino acid.
  3. periyasamy

    A level Biology: Post your doubts here!

    what is the answer?
  4. periyasamy

    A level Biology: Post your doubts here!

    Buddy ,got this from somebody's post b4. Bonds are broken once when DNA unzips, and the next time when the mRNA has been formed and is separated from the DNA strand. Bonds form the first time when free nucleotides join the strand to form mRNA, and the second time when mRNA is formed and DNA...
  5. periyasamy

    A level Biology: Post your doubts here!

    Buddy,I think answer should be a as first of all option c and d should be directly cancelled as the two strands of dna must be antiparallel in direction one 3-5 n another 5-3.Then option a is choosen not b as dna no uracil,instead thymine.
  6. periyasamy

    A level Biology: Post your doubts here!

    For the 1st question,simple concept primary consumer n the producer must always be closely associated or related so must be either c or d.Ans should be d as primary consumer must be in lesser number than producer.
  7. periyasamy

    Chemistry: Post your doubts here!

    Buddy,easier way to do this is draw a basic structure for all options given that their carbon no is same.
  8. periyasamy

    A level Biology: Post your doubts here!

    why option d is rejected?Thank u again........:whistle:
  9. periyasamy

    A level Biology: Post your doubts here!

    Guys a few other questions too.If u have some time,can u help me by explaining it a bit .Thank u...Really appreciate it................ in this question why option d is not accepted.Answer is option b.
  10. periyasamy

    Chemistry: Post your doubts here!

    Buddy,for 1st question i think the option a is not taken because ammonia is solluble in h20 soits conductivity in aqeous should be solluble. For the 2nd question generally osmotic pressure increase when solute added to solvent.The addition of solute(h20) cause molarity to increase n the osmotic...
  11. periyasamy

    A level Biology: Post your doubts here!

    Hai, can anyone help me with some biology mcq from may june 2013 .Thanks a lot. Answer for 1st question is b.
  12. periyasamy

    Physics: Post your doubts here!

  13. periyasamy

    Physics: Post your doubts here!

    Thank u Jessie
  14. periyasamy

    Physics: Post your doubts here!

    Hai ,can anyone help me to solve this doubt?Thanks a lot.Three question from may june 13.
  15. periyasamy

    Physics: Post your doubts here!

    Thaks a lot buddy.Any questions u have send it to me man.I can try to help u,man.
  16. periyasamy

    Physics: Post your doubts here!

    Hai !This is a question from may june 2013 paper.Anyone can help me please?
  17. periyasamy

    BIOLOGY PRACTICAL 34 OCT/NOV

    Here,press this link
  18. periyasamy

    BIOLOGY PRACTICAL 34 OCT/NOV

    http://cd1.edb.hkedcity.net/cd/science/biology/resources/l&t2/practical/practical-5.pdf man,sorry.I was simply trying to make u angry.Sorry agn.Here ,this will solve everything for u.
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