大肠杆菌核糖体大亚基的沉降系数是( )。A.80S B.70S C.60S

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问题 大肠杆菌核糖体大亚基的沉降系数是( )。A.80SB.70SC.60SD.50sE.40S

选项 A.80S
B.70S
C.60S
D.50s
E.40S

答案 D

解析 大肠杆菌为原核生物,原核生物的核糖体沉降系数是70S,大、小亚基沉降系数分别为50S和30S。真核核糖体沉降系数为80S,大、小亚基沉降系数分别为60S和40S。
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