题目内容
DNA变性的原因是
2021-12-14
A.3′，5′-磷酸二酯键的断裂
B.二硫键的断裂
C.互补碱基之间氢键断裂
D.碱基甲基化修饰
E.多核苷酸链解聚
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='29559' and id < 2403377 and id<>'2403377' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29559' and id > 2403377 and id<>'2403377' order by id asc limit 5