O tridente de Netuno Considerações sobre a bioquímica da origem da vida
The origin of life is a polemical scientific-philosophic question that has been debated for ages. The theory of Spontaneous Generation, which declared that organisms sprouted spontaneously from various nature materials, permeated science since the Pre-Socratic philosophers age until the end of...
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| Format: | Article |
| Language: | Portuguese |
| Published: |
Universidade Nove de Julho
2003-01-01
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| Series: | ConScientiae Saúde |
| Online Access: | http://www.redalyc.org/articulo.oa?id=92900216 |
| Summary: | The origin of life is a polemical scientific-philosophic
question that has been debated for ages. The theory of
Spontaneous Generation, which declared that
organisms sprouted spontaneously from various nature
materials, permeated science since the Pre-Socratic
philosophers age until the end of the 19th century, when
it was declined by Louis Pasteur, who showed that life
can not be originated from lifeless matter. The modern
knowledge concerning cellular biochemistry teaches us
that a cell is a highly complex and organized system.
The current studies concerning the origin of life search
to reproduce the chemical processes occurred in our
planet by the supposed age in which life could has
begun. Some explanations have been proposed to
explain part of the question the synthesis of
aminoacids by single substances was carried out by
Stanley Miller, during the mid 20th century. Reactions of
carbohydrates, nucleotides and complex
macromolecules formation have been currently
investigated. The origin of the complex biological
macromolecules is maybe originated from atoms of
positively charged metals that can attract polymerized
monomers. Thioesters have been considered as
possible precursors of the current cellular methabolits.
Presently it has been accepted the proposition of RNA
as an informative and catalytic substance implicated in
the earliest origin of life processes. |
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| ISSN: | 1677-1028 1983-9324 |