Chapter 19, Problem 37RQ

Summary Introduction

To review:

The phases of protein synthesis during which thefollowing processes occur:

a. A ribosomal subunit binds with the messenger RNA (mRNA).

b. The polypeptide is actually synthesized.

c. The ribosome moves along the codon sequence.

d. The ribosome dissociates into its subunit.

Introduction:

The process of synthesis of proteins is called translation. Translation occurs in mainly three steps: initiation, elongation, and termination. Initiation is the process in which the ribosome binds with the mRNAsequence. In elongation, amino acids are joined by peptide bonds and a polypeptide starts growing. The last step is termination;polypeptidestopsgrowing and the two subunits of the ribosomedissociate from themselves and mRNA.