【简答题】酵母的2μm质粒有______,可以配对形成哑铃结构。
【单选题】为了在酵母菌中表达外源基因的稳定性,通常使用的载体是( )。
【单选题】According to the author,
A.
the investigation of the life cycle of a protozoon is pure research.
B.
applied investigation is looked down upon in modern society.
C.
the discovery of X-rays was made in applied research.
D.
the common classification of research is neither accurate nor impersonal.
【单选题】According to the passage, Redbox______.
A.
has a streaming-video service now
B.
has been researching its on-demand options
C.
has already launched its plan B
D.
has cooperated with Sonic Solutions
【判断题】酿酒酵母菌中的2μm质粒是一种具有自主复制能力的质粒