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Homework Help: What biomolecule is this?

  1. Jun 15, 2008 #1
    [tex] C_x (H_2 O)_y [/tex]
    What biomolecule is this?
    At first I thought carbohydrate but the ratio of hydrogen to carbon is not necessarily 2:1.
    And then I said lipid, but then the hydrogen and oxygen are in a ratio of 2:1.
  2. jcsd
  3. Jun 15, 2008 #2
    Sucrose has 22 hydrogens and 12 carbons, which does not yield a hydrogen to carbon ratio of 2:1. Is sucrose still a carbohydrate?

    I believe the answer to this question will provide you with the answers you need.
  4. Jun 15, 2008 #3
    Oh ok, I just wasn't sure.
    So it only depends on the ratio of hydrogen to oxygen?
  5. Jun 17, 2008 #4
    Right. It's a carbohydrate - you can distinguish it by the characteristic hydrogen to oxygen ratio.
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