在正常情况下细胞内完全可以自主合成组成核酸的核糖和脱氧核糖现在细胞系由于�生基因突变而不能自主合成核糖和脱氧核糖必须从培养基中�取为 Template




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tomski在正常情况下细胞内完全可以自主合成组成核酸的核糖和脱氧核糖现在细胞系由于�生基因突变而不能自主合成核糖和脱氧核糖必须从培养基中�取为 coloring