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'''HomochiralityHomoquiralidad''' refers to the property of se refiere a group of molecules having the same la propiedad de un grupo de moléculas que tienen la misma [[chiralityquiralidad]]. A substance is said to be homochiral if all the constituent units are molecules of the same chiral form Una sustancia se dice que es homoquiral si todas las unidades constituyentes son moléculas de la misma forma quiral ([[enantiomerenantiómero]]). Life requires polymers with all building blocks having the same chiral form, such as DNA and RNA having only 'right-handed' sugars and proteins being formed only by 'left-handed' amino acids.<ref>{{cite book|author=Sarfati, Jonathan|authorlink=Jonathan Sarfati|title=[[By Design]]|publisher=Creation Book Publishers|year=2008|location=Australia|page=175|isbn=978-0-949906-72-4}}</ref> Homochirality is a unique property of living matter and gradually disappears after the death of living matter. Homochirality presents a challenge to materialists who need to explain the origin of life via purely natural mechanisms.