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2018_2019学年高中生物3.1DNA是主要的遗传物质（知识框架）生物体内的核酸素材新人教版必修2.pptx

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生物体内的核酸,有细胞结 构的生物,没有细胞结 构的生物,既有DNA 又有RNA (2种核酸),5种碱基（AGCTU） 2种五碳糖(脱氧核糖和核糖) 8种核苷酸,DNA病毒 (如T2噬菌体),RNA病毒 (如SARS病毒、 HIV病毒),4种碱基（AGCT） 1种五碳糖(脱氧核糖) 4种核苷酸,4种碱基（AGCU） 1种五碳糖(核糖) 4种核苷酸,

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