What is the biomolecule with a characteristic hydrogen to oxygen ratio?

  • Context: Chemistry 
  • Thread starter Thread starter Ed Aboud
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Discussion Overview

The discussion centers around identifying a biomolecule characterized by a specific hydrogen to oxygen ratio, with a focus on carbohydrates and lipids. Participants explore the implications of these ratios in classifying biomolecules.

Discussion Character

  • Conceptual clarification, Debate/contested

Main Points Raised

  • One participant proposes the formula C_x (H_2 O)_y and initially considers carbohydrates but questions the 2:1 hydrogen to carbon ratio.
  • Another participant mentions sucrose, providing its hydrogen and carbon counts, and questions whether it still qualifies as a carbohydrate despite not having a 2:1 hydrogen to carbon ratio.
  • A participant seeks clarification on whether the classification depends solely on the hydrogen to oxygen ratio.
  • One participant asserts that it is a carbohydrate, emphasizing the importance of the characteristic hydrogen to oxygen ratio for identification.

Areas of Agreement / Disagreement

Participants express uncertainty about the classification of certain biomolecules, particularly regarding carbohydrates and their ratios. There is no consensus on the implications of the hydrogen to carbon ratio for biomolecule classification.

Contextual Notes

There are limitations in the discussion regarding the definitions of carbohydrates and lipids, as well as the specific ratios that apply to various biomolecules. Some assumptions about the ratios may not be universally accepted.

Ed Aboud
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[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.
Thanks.
 
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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.
 
Oh ok, I just wasn't sure.
So it only depends on the ratio of hydrogen to oxygen?
 
Right. It's a carbohydrate - you can distinguish it by the characteristic hydrogen to oxygen ratio.
 

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