What is the next step after an amino acid on the tRNA in the P site is linked to an amino acid on the tRNA in the A site?
6. After the tRNA properly binds in the A site, a peptide bond is formed between the peptide on the tRNA in the P site and the amino acid on the tRNA in the A site. The catalyst for the peptide bond is the 23S rRNAs in the ribosome. Thus, peptide bonds are formed by ribozymes (catalytic RNAs).
What happens to the tRNA once it releases its amino acid?
The tRNA that has given up its amino acid is released. It can then bind to another molecule of the amino acid and be used again later in the protein-making process.
What happens to the tRNA after it brings the amino acids to the ribosome?
When a tRNA recognizes and binds to its corresponding codon in the ribosome, the tRNA transfers the appropriate amino acid to the end of the growing amino acid chain. Then the tRNAs and ribosome continue to decode the mRNA molecule until the entire sequence is translated into a protein.
How does a ribosome know when a protein strand should start producing and when it should stop adding amino acids?
At the start of the initiation phase of translation, the ribosome attaches to the mRNA strand and finds the beginning of the genetic message, called the start codon (Figure 4). This codon is almost always AUG, which corresponds to the amino acid methionine.
What role does the tRNA play in protein synthesis?
The overall role of tRNA in protein synthesis is to decode a specific codon of mRNA, using its anticodon, in order to transfer a specific amino acid to the end of a chain in the ribosome.
What is the impact on protein synthesis of a diet deficient in one or more essential amino acids quizlet?
What is the impact on protein synthesis of a diet deficient in one or more essential amino acids? The ribosomes cannot finish making protein.
What is the process called when mRNA is copied from DNA?