题目内容

关于DNA双螺旋结构模型的描述正确的是( )

A. 腺嘌呤的克分子数等于胞嘧啶的克分子数
B. 同种生物体不同组织的DNA碱基组成不同
C. 碱基对位于DNA双螺旋的外侧
D. 两股多核苷酸链通过A与T或C与G之间的糖苷键连接
E. 维持双螺旋结构稳定的主要因素是氢键和碱基堆积力

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