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**UvjqTVVC** · 09-02-2012, 04:27 PM

> I think it is too too far extrapolation of glycolaldehyde to sugars

Perhaps, since it's only a dimer, but it does have the correct 2:1 ratio of hydrogen to oxygen that characterises sugars; which makes it a true carbohydrate. The ratio of elements is important in the origins of life. For proteins you need a H:C:N:O ratio of 6:4:4:1, for sugars (eg. the ribose of RNA) you need a ratio of 2:1:0:1, for nucleotides you need a ratio of 1:1:1:0. For phosphates you need a different ratio again - all four necessary components of modern life must have formed under different chemical conditions.

09-02-2012, 04:27 PM	#5
UvjqTVVC Join Date Nov 2005 Posts 437 Senior Member	> I think it is too too far extrapolation of glycolaldehyde to sugars Perhaps, since it's only a dimer, but it does have the correct 2:1 ratio of hydrogen to oxygen that characterises sugars; which makes it a true carbohydrate. The ratio of elements is important in the origins of life. For proteins you need a H:C:N:O ratio of 6:4:4:1, for sugars (eg. the ribose of RNA) you need a ratio of 2:1:0:1, for nucleotides you need a ratio of 1:1:1:0. For phosphates you need a different ratio again - all four necessary components of modern life must have formed under different chemical conditions.
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