What is the role of a ribosome in the production of a polypeptide? (3)

Begin with asking the student what their understanding is of DNA's structure and function. I would discuss the background structure to DNA - including the matching of base pairs, and the overall structure, guided by what the student's understanding is. I'd then discuss that RNA is used to code for DNA in order to convert the 'code' into a protein, through the processes of RNA transcription and translation. Transcription is the process by which DNA is converted into RNA, and translation is the process by which the code carried by mRNA is decoded into amino acids to produce proteins. This question is focusing on the translation phase of the process.The ribosome acts as an enzyme during translation, in order to produce the appropriate combination of amino acids to produce a protein. The mRNA (messenger RNA) that was previously produced during transcription binds with a ribosome. Two codons (groups of 3 bases) are used to bind with two anti-codons (the complimentary 3 base pairs) on tRNA (transfer RNA). Each transfer RNA molecule is bound with an amino acid. The two amino acids bound to the tRNA then form a peptide bond between them. This process is repeated as the ribosome moves along the mRNA until a polypeptide chain of amino acids is produced. This polypeptide chain then goes on to form a protein.I'd be checking the terminology used and opening up to questions at any point to ensure that this is making sense. I'd also draw some pictures to illustrate the process.

LF
Answered by Laura F. Biology tutor

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