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The emergence of biomolecular homochirality is a critical open question inthe field of origins of life. In order to seek out an answer to this unsettledissue, a number of mechanisms have been offered over time, but it still remainsa great challenge to date. In this paper, based on the hydrothermal vent theoryfor the origins of life, I tentatively put forward a new hypothesis that theprebiotic emergence of the uniform chirality of biomolecules might have beenspecifically determined by the spin state of electrons during their prebioticsyntheses on the surfaces of greigite, a mineral which has been frequentlyargued to have played an important role in the evolutionary context of life. Anexperimental model to test the hypothesis has also been proposed. Taken intoconsideration the possible widespread existence of greigite in submarinehydrothermal vent systems which have been frequently argued as a potentialcradle for the origins of life, the suggested model, if could be experimentallydemonstrated, may be suggestive of where and how life originated on earlyEarth.

A testable hypothesis on the possible role of electron spin in the origin of bio-homochirality