In an E. coli cell, which of the following is the last item to be added to the 70S initiation complex?
A)mRNA
B)tRNA carrying formylmethionine
C)30S ribosomal subunit
D)50S ribosomal subunit
E)initiation factors IF1, IF2 and IF3

Question

Quizplus · Accepted Answer

The 50S ribosomal subunit is the last item to be added to the 70S initiation complex, completing the formation of the fully functional ribosome. First, the small 30S ribosomal subunit binds to the mRNA, followed by the initiator tRNA carrying formylmethionine. Then, the initiation factors IF1, IF2, and IF3 help to position the larger 50S subunit, which then joins the complex to form the mature 70S ribosome.

In an E Coli Cell, Which of the Following Is the Last