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遗传物质

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遗传物质生物用来储存遗传讯息的物质,也是亲代与子代之间传递遗传信息的物质。目前已知的所有生物中,几乎全部都以DNA为遗传物质分子,少数如部分病毒,则以RNA作为遗传物质。除此之外,过去科学家曾经以为生物的遗传物质为蛋白质。确认DNA为遗传物质的实验为赫希-蔡斯实验。 但也有科学家认为蛋白质也可以充当遗传物质,如仅由蛋白质构成的朊病毒(但现在已知它不是病毒,而是仅由蛋白质构成的致病因子)。

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遗传物质
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