Monday, 23 December 2013

Tagged under: , , , , , , , , , , ,

In bacteria, a 70S initiation complex is assembled from the two ribosomal subunits, mRNA, and initiator tRNA with the assistance of three initiation factors and energy from GTP.

The sequence of event in which this process takes place in a very brief manner 

please list the following in order
A. IF3 binds to the 30S subunit and prevents its association with the 50S subunit.
B. Initiation factors are released from the complex
C. The 50S subunit joins the complex
D. tRNAfMet, with the IF2 and GTP bound, binds to the start codon. IF1 then binds to the A site of the 30S subunit.
E. A 70S iniation complex is formed
F. The 16S rRNA base-pairs with the Shine - Dalgarno sequence.

  1. IF3 binds to the 30S subunit and prevents its association with the 50S subunit.
  2. The 16S rRNA base-pairs with the Shine - Dalgarno sequence.
  3. tRNAfMet, with the IF2 and GTP bound, binds to the start codon. IF1 then binds to the A site of the 30S subunit.
  4. The 50S subunit joins the complex
  5. Initiation factors are released from the complex
  6. A 70S initiation complex is formed

0 comments: