Almost all amino acids that make up biological proteins, for instance, are left-handed, so a self-replicating biological molecule of right-handed chirality could be suggestive of an alien organism.
比如说，几乎所有构成生物蛋白的氨基酸都是左手性的，所以出现右手手性的自我复制生物分子可能意味着发现了外星生物体。
Each DNA molecule that forms a chromosome must contain a centromere, two telomeres, and replicating origins.
每个dna分子包含一个着丝粒、两个端粒和多个复制源。
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