题目细菌的核糖体由下列亚基组成(1分)A. 50SB. 50S或30SC. 50S和30SD. 30S或60SE. 40S和60S细菌的核糖体由下列亚基组成(1分)A. 50SB. 50S或30SC. 50S和30SD. 30S或60SE. 40S和60S题目解答答案C. 50S和30S