Question

What is the subunits composition of prokaryotic ribosomes?

• A. 50S and 40S
• B. 50S and 30S
• C. 60S and 30S
• D. 60S and 40S

Answer 1

Answer:

B. 50S and 30S

• In prokaryotes each ribosome is composed of small (30S) and large (50S) components, called subunits,

• which are bound to each other:

• (30S) has mainly a decoding function and is also bound to the mRNA.

• (50S) has mainly a catalytic function and is also bound to the aminoacylated tRNAs