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Abstract
The chiral puzzle of biological molecules is thought to be closely related to the origin of life and is still a mystery so far. Previously, we proposed a new model on the origin of life, Nebula-Relay hypothesis, which assumed that the life on Earth originated at the planetary system of the Sun’s predecessor star and then filled in the pre-solar nebula after its death. As primitive lives existed in the pre-solar nebula for a long time, did the chiral biomolecules form during this period? We explore such a possibility in this work and find that the ultra-low temperature environment of molecular clouds is beneficial to generating the chiral polymer chain of biological molecules.
Highlights
Symmetry usually refers to the invariance of an object under some transformations, such as translation, reflection, and rotation
As primitive lives existed in the pre-solar nebula for a long time, did the chiral biomolecules form during this period? We explore such a possibility in this work and find that the ultralow temperature environment of molecular clouds is beneficial to generating the chiral polymer chain of biological molecules
Can the chiral puzzle be satisfactorily explained in the NebulaRelay hypothesis? We explore this problem in this article and try to prove that the low-temperature environment is conducive to the production of biological chirality
Summary
Symmetry usually refers to the invariance of an object under some transformations, such as translation, reflection, and rotation. The famous Murchison meteorite is one kind of carbonaceous chondrite which is rich in organic compounds and contends more than fifteen types of amino acids (Wolman et al, 1972). There are ninety two types of amino acids identified in meteorites according to current research studies (Cronin et al, 1995; Martins et al, 2009; Glavin et al, 2010; Elsila et al, 2016; Burton and Berger, 2018). These facts may hint that there are amino acids in molecular clouds.
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