A.軟脂酸 B.油酸 C.十四酸鹽(肉豆蔻酸鹽) D.乙酰基 E.以上都對(duì)
A.tRNA B.mRNA C.rRNA D.DNA
A.20S,40S B.30S,50S C.40S,60S D.50S,70S