Multiple Choice
What is the function of the release factor during translation?
15. Central Dogma & Gene Regulation
Steps of Translation
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When is a peptide bond formed during the process of translation?
A
During the elongation phase, just after a tRNA charged with the next amino acid binds to the A site.
B
During the termination phase, just after the release factor binds to the A site.
C
During the elongation phase, just after a tRNA that has lost its amino acid and exits the E site.
Verified step by step guidance1
Understand the process of translation, which is the synthesis of proteins from mRNA. It involves three main phases: initiation, elongation, and termination.
Focus on the elongation phase, where the ribosome travels along the mRNA, and amino acids are added one by one to the growing polypeptide chain.
Recognize that during elongation, tRNA molecules bring amino acids to the ribosome. Each tRNA has an anticodon that pairs with the mRNA codon, ensuring the correct amino acid is added.
Identify the A site of the ribosome, where the incoming tRNA charged with an amino acid binds. This is crucial for peptide bond formation.
Note that a peptide bond is formed between the amino acid in the P site and the amino acid in the A site, catalyzed by the ribosomal RNA, thus elongating the polypeptide chain.
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