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Please help with biochem HW questions!!

Discussion in 'Pre-Dental' started by highlanderdds, Apr 17, 2004.

  1. highlanderdds

    highlanderdds aka highlanderDMD
    7+ Year Member

    Dec 4, 2003
    Likes Received:
    Please help me with couple biochemistry homework questions~ Thanks :)

    The specific activity of an enzyme:
    a) is given by the units rate/mg protein
    b) increases as an enzyme is purified
    c) decrease as the enzyme is purified
    d) a) and b)
    e) b) and c)

    Characteristic feature(s) of an enzyme includes
    a) its position at the final step of a multistep biosynthetic pathway
    b) its position at the initial step of a multistep biosynthetic pathway
    c) its sigmoidal V vs. S curve
    d) a) and c)
    e) b) and c)

    :confused: :confused: :idea:
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  3. ziptree

    ziptree DDS
    10+ Year Member

    Mar 25, 2003
    Likes Received:
    Specific Activity:
    1. d) a and b.

    a) Wouldn't do much good if it were at the end.
    b) If its at the beginning, then allosteric (negative) inhibition of the product could occur. So this could be right.
    c) Isn't a sigmoidal curve an S-shaped curve?

    Either it's B or E...sorry I don't know this one for sure. I'd put B. =p

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