—You’re supposed to hand in the travel diary as soon as possible.

—I see. I’m going to _________until 11:30 pm once more.

A．cheer up

B．put up

C．turn up

D．stay up

目的基因主要是指（）

A.RNA聚合酶结合位点

B.终止转录的核苷酸序列

C.具有调控作用转录的核苷酸序列

D.编码蛋白质的基因