How is polypeptide chain synthesis initiated in prokaryotes?

Question

27 Jan 2024

Answer :

Word Count : 442

In prokaryotes, the initiation of polypeptide chain synthesis occurs through a process known as translation. Translation is a key step in protein synthesis where the information encoded in messenger RNA (mRNA) is used to build a polypeptide chain. The initiation of translation involves several essential components, including mRNA, ribosomes, initiator tRNA, and initiation factors.

1. Messenger RNA (mRNA): The process begins with the synthesis of mRNA during transcription. In prokaryotes, the mRNA is often polycistronic, meaning it contains the coding information for multiple proteins in a single transcript. The ribosome recognizes specific regions on the mRNA called the Shine-Dalgarno sequence, which helps position the ribosome for initiation.

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