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Questions and Answers
What is required for the insertion of selenocysteine at some UGA codons?
What is required for the insertion of selenocysteine at some UGA codons?
- An unusual tRNA and a specific elongation factor
- An unusual tRNA and several proteins (correct)
- A common tRNA and several proteins
- A common tRNA and a specific elongation factor
What happens once the polypeptide chain protrudes from the ribosome during translation?
What happens once the polypeptide chain protrudes from the ribosome during translation?
- The chain undergoes transcription to form mRNA
- The ribosome detaches from the chain
- The ribosome protects the chain from post-translational modification
- The polypeptide chain folding and post-translational modification begin (correct)
What is the unusual amino acid that can be inserted at certain UAG codons?
What is the unusual amino acid that can be inserted at certain UAG codons?
- Methionine
- Selenocysteine
- Pyrrolysine (correct)
- Cysteine
What are some examples of covalent modifications that can occur during post-translational modification?
What are some examples of covalent modifications that can occur during post-translational modification?
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What does the UGA codon specify in the ciliate Euplotes crassus?
What does the UGA codon specify in the ciliate Euplotes crassus?
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What is the process of peptide chain splicing during post-translational modification?
What is the process of peptide chain splicing during post-translational modification?
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