【单选题】What is the special feature of the Golden Rice?
A.
It can increase the vitamin A level in human body.
B.
It can easily be absorbed by young children.
C.
It is the byproduct of a gene conversion project.
D.
It can grow ripe weeks earlier than usual rice.
【单选题】以下不属于DNA碱基的损伤与丢失的是( )。
【判断题】单位活期存款利息计息一般采取“算头不算尾”的原则,但遇结息日采取“算头算尾”的原则。
【单选题】Which of the following privilege level is the most secured?
【单选题】Which of the following privilege level is the most secured?
【单选题】The most commonly used locked level in implementing concurrency control is at which of the following levels? ( )
【单选题】单位活期存款计息说法不正确的是( )
B.
存期若遇到结息日,应采取“算头又算尾”的方法
【单选题】如图为某DNA分子片段,假设该DNA分子中有碱基5000对,A+T与碱基总数的34%,若该DNA分子在含 14 N的培养基中连续复制2次,下列叙述正确的是( )
【单选题】亚硝酸盐可使DNA的某些碱基中的氨基脱去,碱基脱去氨基后的变化如下:C转变为U(U与A配对),A转变为I(I为次黄嘌呤,与C配对)。现有一DNA片段为 ,经亚硝酸盐作用后,若链①中的A、C发生脱氨基作用,经过两轮复制后其子代DNA片断之一为 [ ]