Bacterial ribosomes are composed of two subunits, and each ribosome contains a total of three rRNA molecules. An investigation of all the 70S ribosomes in one cell of the bacterium Escherichia coli found that there were: • 57 a0000 rRNA molecules • three kinds of rRNA molecule • 19 a0000 copies of each kind of rRNA molecule. What number of 70S ribosomes were present in the E. coli cell?
- A9500
- B19 a0000
- C38 a0000
- D57 a0000