70S核糖体可以分为（）和50S大亚基，80S核糖体可以分为40S小亚基和60S大亚基。

此题为判断题(对，错)。

A.30S小亚基和50S大亚基组成

B.40S小亚基和50S大亚基组成

C.40S小亚基和70S大亚基组成

D.30S小亚基和70S大亚基组成

A.70S

B.80S

C.90S

D.100S

E.120S

A.80S

B.70S

C.60S

D.50s

E.40S

A.40s

B.50s

C.60s

D.20s

A.80S和100S

B.60S和80S

C.50S和70S

D.40S和60S

A.起始因子不同：原核为IF—1、IF—2、IF—3，真核起始因子达十几种。 

B.起始氨酰—tRNA 不同：原核为fMet—tRNA，真核为Met—tRNA

C.核糖体不同：原核为70S核粒体，可分为30 S 和50S两种亚基，真核为80S核糖体，分为40S和60S两种亚基。

D.合成部位不同：原核为细胞核，真核为细胞质

此题为判断题(对，错)。

A.20S，40S

B. 30S，50S

C. 40S，60S

D. 50S，70S