mRNA分子上的起始密码是（），它所编码的氨基酸在原核细胞为met，在真核细胞为fmet。
参考答案：AUG
--- Whose names are these, ________ or yours?
---_______. I don’t know all of the students in Class 5, so I have _______on this piece of paper.
A．theirs; Theirs; them
B．their; Theirs; they
C．their; Theirs; them
D．theirs; They; them
养老保险是国家和社会通过相应的制度安排为劳动者解除养老后顾之忧的一种社会保险。（）
