题目

Traditional Chinese medicine effectively applied for thousands of years before its market was strongly impacted by western medicine in modernized China. A . had been being B . had been C . was D . has been 答案：B12．如图代表两个核酸分子的一部分，请根据下图回答问题．（1）以乙链为模板合成丙链，丙链上碱基的排列顺序自上而下应是ACUGAA．（2）在甲、乙、丙三条链中，共有密码子2个．