答案:C
真核细胞核糖体的沉降系数及其大小亚基的沉降系数分别是()
A.80S,60S,40S
B.70S,50S,30S
C.80S,50S,30S
D.70S,40S,30S
被认为是重要的致龋菌的为()
A.变形链球菌
B.血链球菌
C.消化链球菌
D.乳杆菌属
E.放线菌属