高中生物必须修读二3_2DNA分子的结构.ppt
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第2节 DNA分子的结构
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一. DNA的基本单位-脱氧核苷酸
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化学元素组成:
C H O N P
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A
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腺嘌呤
鸟嘌呤
胞嘧啶
胸腺嘧啶
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腺嘌呤脱氧核苷酸
鸟嘌呤脱氧核苷酸
胞嘧啶脱氧核苷酸
胸腺嘧啶脱氧核苷酸
脱氧核苷酸的种类(4种)
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一、DNA双螺旋结构模型的构建
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1953年,美国科学家沃森(J.D.Watson,1928—)和英国科学
家克里克(F.Crick,1916—2004),共同提出了DNA分子的双螺旋结构模型。
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1、沃森和克里克在构建模型的过程中,利用了他人的哪些经验和成果?
(1)英国科学家威尔金斯和富兰克林
(2)奥地利著名生物化学家查哥夫
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