Lecture22 - Chemistry and Life Basics: Lab results:...

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Chemistry and Life – Basics : Lab results : ¾ possible to synthesize amino acids from a mixture of gases and energy ¾ Energy could be lightening, UV radiation, volcanic activity or meteor impacts. ¾ presence of liquid water speeds up reactions On Earth : ¾ all living systems use the same types of molecules; simplest = nucleic acids and proteins (amino acids) ¾ amino acids are easily produced, and are found in some carbonaceous chondrites ¾ may have become concentrated in evaporating pools, and combined to form complex molecules. ¾ oldest life evidence 3.5x10 9 yr ago ¾ stromatolites: calcium deposits created by marine microorganisms Astro data : ¾ abundance of complex molecules in the interstellar medium ¾ meteorites, lunar rocks. .. have complex molecules but not life ¾ amino acids in meteorites both “left” and “right” handed (Earth amino acids are mostly left-handed)
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Requirements for (complex) life to start? Presence of amino acids (seems to be fairly easy)
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Lecture22 - Chemistry and Life Basics: Lab results:...

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