The Grand Historical Index Of Whoof Arted
February 10, 2009
Carbon on earth
The universe consists of
70.0 % of hydrogen (H),
28.0% of helium (He),
0.92 % of oxygen (O),
0.34 % of carbon (C),
and 0.12 % of nitrogen (N).
Living creatures use all of these but helium.
The heroic molecule:
Hydrogen, oxygen, carbon, and nitrogen are abundant
in the universe, and they are the basic elements for
organic molecules. The
organic molecules, whose main
structures are made of carbon
atoms, seem to polymerize and
become complicated polymer
substances such as protein
(folded structure) and DNA
(double helix). They seem
to hold the key to the various
functions (e.g. enzyme, genetic
information) that are essential for life.
posted by john r mclay at 11:43 PM
1 Comments:
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