A. 0.5 B. 1.0 C. 1.5 D. 2.0
A. 8 B. 10 C. 12 D. 15
A. loss of an inhibitor protein,p21 B. loss of a transeription factor C. uncontrolled cell growth and cancer D. all of the above
A. 脱氢 B. 脱氧 C. 脱烃 D. 脱碳
A. 抑制RNA转录 B. 抑制DNA复制 C. 促进RNA转录 D. 促进DNA复制