What is the correct constitution of a bacterial ribosome?
a. 70S overall with a 50S and a 20S subunit.
b. 70S overall with a 50S and a 30S subunit.
c. 70S overall with a 40S and a 30S subunit.
d. 80S overall with a 60S and a 40S subunit.
e. 80S overall with a 50S and a 30S subunit.