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bio chem

Discussion in 'International Dental' started by ridge, Nov 18, 2005.

  1. ridge

    ridge Senior Member
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    HI
    nEED HELP
    ONE STRAND OF DNA has 20%A,30%T40%C.WHAT is the %of C on other strand?
    10
    20
    50
    80
    90
    explain please
     
  2. fido!

    fido! the ex-***!
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    the ans is 10
     
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  3. syk

    syk Senior Member
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  4. inder

    inder Member
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    can anyone please help me answer this

    a slight detachment of retina results in decrease in length of optical centre and subject therefore exhibits

    - near sightedness
    -far sightedness
    -strabismus
    -nystagismus
    please explain!!! :confused:
     
  5. OP
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    ridge

    ridge Senior Member
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  6. OP
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    ridge

    ridge Senior Member
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  7. inder

    inder Member
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    :confused:
     
  8. fido!

    fido! the ex-***!
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    the answer is myopia/near sightedness
     
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  9. fido!

    fido! the ex-***!
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    1.rna polymerase makes any type of rna from dna,thus the answer is ds dna!

    2.the exception is saltatory conduction as it can occur only at nodes of ranvier!
    hope this helps! :thumbup:
    prady!

    -
     
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  10. inder

    inder Member
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    thank u so much for the answers :thumbup:
     
  11. fido!

    fido! the ex-***!
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    u r most welcome,inder!any more questions,that i can help u out with?will be glad to,provided i know! ;)
     
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  12. OP
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    ridge

    ridge Senior Member
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  13. fido!

    fido! the ex-***!
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    thanks ridge!when r u guys taking up ur exams?
     
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  14. OP
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    ridge

    ridge Senior Member
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  15. fido!

    fido! the ex-***!
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    SAME HERE,BUDDY!I ALSO FEEL,I'M UNPREPARED!BUT I HAVE TO TAKE UP MY EXAM AT ANY COST TO MEET THE APPLICATION DEADLINES!I HAVE EXACTLY 11 DAYS TO GO......!SO WISH ME LUCK! ;)
    TAKE CARE !ALL THE BEST TO U TOO!
     
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  16. OP
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    ridge

    ridge Senior Member
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  17. fido!

    fido! the ex-***!
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    thanks pal!well,i'm thinking of applying to upenn,nyu&bu,to name afew!it also depends upon the score!
    take care!all the best to u too! :thumbup:
     
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  18. inder

    inder Member
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  19. celestial

    celestial Member
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    1 pyruvate
    2 emulsification of fatty acids and glycerol

    please correct me if i am wrong.....
     
  20. dent02

    dent02 Member
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    why not lactate?
    pls explain
     
  21. OP
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    ridge

    ridge Senior Member
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  22. inder

    inder Member
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    even i thought the answer is
    - lactate :rolleyes:

    one more
    1. facilitated diffusion differs from active transport in that net transport by facilitated diffusion

    - has transport max
    -uses ATP as energy source
    -requires conc. gradient
    -occurs as an endergonic process
     
  23. OP
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    ridge

    ridge Senior Member
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  24. celestial

    celestial Member
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    its hypoxic state ...right..
    lactate will be formed but NADH is required for conversion of lactate to pyruvate...by enzyme lactate dehydrogenase

    please correct me...if i am wrong
     
  25. fido!

    fido! the ex-***!
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    i think the answer is transport max.correct me if i'm wrong!
     
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  26. celestial

    celestial Member
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    i agree with ridge....
    facillitated diffusion requires conc gradient....
    transport maximum is related to active transport
     
  27. fido!

    fido! the ex-***!
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    dear inder,
    can u plz tell where did u get the Q.2 from?is it from the past papers?do u have the answer for it?
     
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  28. fido!

    fido! the ex-***!
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    BUT IT REQUIRES A CARRIER/TRANSPORTER TOO,RIGHT?
     
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  29. fido!

    fido! the ex-***!
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    A FEW Q'S .....
    1.COMPLEMENTARY DNA LIBRARIES INCLUDE
    A.THE GENES WHICH R TRANSCRIBED INTO mRNA
    B.SINGLE STRANTED DNA SYNTHESIZED BY REVERSE TRANSCRIPTION

    2.THE FIRST HEART SOUND HEARDWHILE DETEMINING blood pressure IS DUE TO
    1.CLOSURE OF AV VALVES
    2.TURBULENT BLOOD FLOW THRO ARTERY
     
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  30. fido!

    fido! the ex-***!
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    hi there,
    anyone to explain the answer?
     
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  31. fido!

    fido! the ex-***!
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    anyone to answer these q.......??
     
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  32. smily

    smily Member
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    ist heart sound----mitral and tricuspid valve closure
    2nd heart sound---aortic and pulmonary valve closure
     
  33. celestial

    celestial Member
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    yes you are right facilitated diffusion requires a carrier for transportation ...

    A FEW Q'S .....
    1.COMPLEMENTARY DNA LIBRARIES INCLUDE
    A.THE GENES WHICH R TRANSCRIBED INTO mRNA
    B.SINGLE STRANTED DNA SYNTHESIZED BY REVERSE TRANSCRIPTION

    2.THE FIRST HEART SOUND HEARDWHILE DETEMINING blood pressure IS DUE TO
    1.CLOSURE OF AV VALVES
    2.TURBULENT BLOOD FLOW THRO ARTERY

    i think
    1 a
    2 a

    please correct me if i am wrong....
     
  34. OP
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    ridge

    ridge Senior Member
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    facilitated diffusion requires a carrier for transportation ... but where this carrier will function?it requires conc gradient and all the other choices in this question are in relation to active transport only.so ans is conc.gradient.



    2.THE FIRST HEART SOUND HEARDWHILE DETEMINING blood pressure IS DUE TO
    1.CLOSURE OF AV VALVES
    2.TURBULENT BLOOD FLOW THRO ARTERY
    ans is (2)
    its while measuring B.P AND NOT WHILE AUSCULTATING CHEST WALL THAT WE CAN LISTEN TO HEART SOUNDS...THESE WERE KORTKOFF SOUNDS
    .
    HOPE EVERYTHING IS CLEARED TO PRADY AND CELESTIAL.
     
  35. OP
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    ridge

    ridge Senior Member
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  36. syk

    syk Senior Member
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    Hi,

    I think it is conc gradient since in the question they have asked how facilitated diffusion differs from active transport.active transport is against conc gradient.Other choices impies to both facilated diffusion and active transport as well.


     
  37. fido!

    fido! the ex-***!
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    hi ridge,
    itz confusing!!!u tell the answer is (2),but while explaining u r telling while measuring b.p.,we listen to heart sounds!please clarify!



    2.THE FIRST HEART SOUND HEARDWHILE DETEMINING blood pressure IS DUE TO
    1.CLOSURE OF AV VALVES
    2.TURBULENT BLOOD FLOW THRO ARTERY
    ans is (2)
    its while measuring B.P AND NOT WHILE AUSCULTATING CHEST WALL THAT WE CAN LISTEN TO HEART SOUNDS...THESE WERE KORTKOFF SOUNDS[/B].
    HOPE EVERYTHING IS CLEARED TO PRADY AND CELESTIAL.[/QUOTE]
     
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  38. smily

    smily Member
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    1. b
    2.a
     
  39. fido!

    fido! the ex-***!
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    thanks for the explanation!
     
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  40. smily

    smily Member
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    we are talking about heart sounds.Kortkoffs sounds are related to arteries
     
  41. fido!

    fido! the ex-***!
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    ok...but ridge,if that is the case,then why u have marked 2,instead of 1?i'm still confused!
     
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  42. celestial

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    hi ridge...
    its bit confusing but...
    i have some doubt ....
    1.COMPLEMENTARY DNA LIBRARIES INCLUDE
    A.THE GENES WHICH R TRANSCRIBED INTO mRNA
    B.SINGLE STRANTED DNA SYNTHESIZED BY REVERSE TRANSCRIPTION

    when c dna libraries are formed m rna is isolated from tissue expressing the gene and then m rna template is reverse transcribed into cDNA using reversetransciptase....then a double stranded c dna is formed......

    can you please help me with this......according to this answer should not be A
     
  43. OP
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    ridge

    ridge Senior Member
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  44. OP
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    ridge Senior Member
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    hi celestial,
    first of all what is cdna?
    its complementary dna,which is single stranded dna formed from mRNA BY enzyme reverse transcriptase so our answer will be (B)
    1.COMPLEMENTARY DNA LIBRARIES INCLUDE

    B.SINGLE STRANDED DNA SYNTHESIZED BY REVERSE TRANSCRIPTION
    I WILL TRY TO ANSWER IT MORE DETAILED IF U R NOT SATISFIED.LET ME KNOW,I WILL WORK ON THIS QUESTION.
     
  45. OP
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    ridge

    ridge Senior Member
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    hI PRADY I THINK U HAVE AGAIN MISREAD THIS POST,I AM NOT WRITING ANSWER 1 ITS BEEN POSTED BY smily who is favoring option 1 ,i am in favor of coice 2.
     
  46. fido!

    fido! the ex-***!
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    THANKS A ZILLION TIMES FOR THE EXPLAINATION! :) I OWE U ONE!SORRY FOR THE TROUBLE!
     
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  47. fido!

    fido! the ex-***!
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    oooopsy!sorry!
     
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  48. celestial

    celestial Member
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    thanks ridge for your patience ......i appreciate your efforts........
    thanks once again.....for explanation..may be i was not reading the choice correctly......
    its become a good thread to discuss questions....lets keep posting more questions......
     
  49. OP
    OP
    ridge

    ridge Senior Member
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  50. inder

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    the question on facilated diff is from old papers this question has been repeated couple of times .
     

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