Question

Describe the process occurring at each feature during the elongation phase of translation

can u tell me please ans its a 10 marks question

Answer 1

The translation is a process by which the genetic code contained within an mRNA molecule is decoded to produce the specific sequence of amino acids in a polypeptide chain.
It occurs in the cytoplasm following transcription and, like transcription, has three stages: initiation, elongation, and termination. Translation elongation is simply the ribosome traveling down the message, reading codons, and bringing in the proper aminoacyl tRNAs to translate the message out to protein. The incoming aminoacyl tRNA is brought into the ribosome A site, where it is matched with the codon being presented. Once it has been secured (by hydrolysis of GTP to “fix” it in place), the peptidyltransferase reaction occurs. This is where the bond between the peptide and the aminoacyl tRNA in the P site is broken, while a new bond is simultaneously formed between the (momentarily unattached) peptide and the new amino acid in the A site.