Which of the following is not a stop codon

Which of the following is the appropriate protein sequence translated from RNA

Expert Solution

1) Which of the following is not a stop codon

UAA
UAG
UAU - Correct Option
UGA

Explanation: A Stop Codon in a mRNA sequence do not code for any amino acid. Therefore, when a ribosome reaches a Stop Codon, it signals the termination of the protein synthesis. UAG, UAA and UGA are the three Stop codons. There are no tRNA molecules that match the Stop Codon, however, release factors recognize this sequence and attaches causing the newly created polypeptide chain to release.

2) Which of the following is the appropriate protein sequence translated from RNA sequence

AUG GAU CCG AUA AUG ACG GUC CUU AAU UGA:

Met-Asp-Pro-Ile-Met-Thr-Val-Leu-Asp Stop - Correct Option

Explanation: An Amino acid translation table can be used to translate a given mRNA sequence into an amino acid sequence. For example following Link can be used: http://atozee.co.uk/genetics/DNA3.html. Each three-letter sequence of mRNA nucleotides corresponds to a specific amino acid, or to a stop codon. AUG is usually the start codon and codes for Methionine amino acid. The sequence terminates with a Stop Codon. Each anticodon on tRNA matches up with a codon on the mRNA. Therefore, amino acids are assembled in the correct order which is dictated by the mRNA code.

gladiator answered 2 years ago

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