biochem doubt!!!!

Discussion in 'NBDE Exams & Licensure Exams' started by toothfairy21, Dec 14, 2008.

  1. toothfairy21

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    1)Following peptide carries what charge in water at pH 7? Arg,leu,phe,lys,glu,gly

    A 1
    B 2
    C 0
    D -1
    E -2

    2)What is d net charge on glutamic acid at a pH of 1 ?
    a. +2
    b. +1
    c. 0
    d. - 1
    e. -2
     
  2. krasnodar

    krasnodar Junior Member
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    1. methyl xanthines such as caffine n theophyliine enhance lipolysis in adipose tissue by
    a] inducing adenylate cyclase synthesis
    b]inducing triglyceride lipase synthesis
    c]inhibiting cyclic amp phosphodiestrase activity
    d]directly activating intracellular protien kinase
    e]enhancing binding of epinephrine to an extra cellular membrane receptor
     
  3. Count Orlok

    Count Orlok Octagonecologyst
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    c inhibiting cAMP phosphodiesterase activity

    Methylxanthines (caffeine, theophiline, theobromine) are active principles with lipolytic activity. These
    principles enhance lipolysis by rising AMPc intracellular levels; this is because methylxanthines inhibit
    phosphodiesterase enzyme
     
  4. d dimps

    d dimps d dimps
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    answer
     
  5. d dimps

    d dimps d dimps
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    c]inhibiting cyclic amp phosphodiestrase activity
     
  6. molar9

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    Are you sure it is not because of increasing the activity of adenylate cyclase ?
     
  7. chipotle

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    Answer is C- Inhibiting Camp phospdiesterase activity
     
  8. CoCo111

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    hello...I was wondering if anyone would mind explaining collagen synthesis with regards to the amount of detail we need to know for the exam . . .

    Thank you for your help
     
  9. phoenix90

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    study lippencort
     
  10. metrogyl80

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    can any one answer this question?

    . Assuming that P50 = 26 torrs, under conditions where pO2 = 30 torrs, the average number of O2 molecules bound per hemoglobin molecule is closest to

    A. 0.5.
    B. less than 1.
    C. almost 2.
    D. greater than 2.
    E. greater than 3.
     

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