DNA sequence – TAC GTA GTC ACC TAA TGG ATC…mRNA sequence – AUG CAU CAG UGG AUU ACC UAG…Amino acid sequence – met his gln trp ile thr stop how many amino acids will be in the polypeptide produced by the normal DNA/mRNA sequence?
To determine the number of amino acids in the polypeptide produced by the normal DNA/mRNA sequence, we need to understand the process of translation, where the mRNA is used as a template to synthesize a protein
To determine the number of amino acids in the polypeptide produced by the normal DNA/mRNA sequence, we need to understand the process of translation, where the mRNA is used as a template to synthesize a protein.
In translation, the mRNA is read in triplets called codons. Each codon corresponds to a specific amino acid. The sequence “AUG” in the mRNA serves as the start codon, which codes for the amino acid methionine (Met) and signals the beginning of protein synthesis. Then, the subsequent codons are read until a stop codon is encountered, which does not code for an amino acid but signals the termination of translation.
Let’s analyze the provided mRNA sequence: “AUG CAU CAG UGG AUU ACC UAG.”
Starting with the start codon, “AUG” codes for methionine (Met). The subsequent codons, “CAU” and “CAG,” code for histidine (His) and glutamine (Gln), respectively. The codon “UGG” codes for tryptophan (Trp), “AUU” codes for isoleucine (Ile), and “ACC” codes for threonine (Thr). The codon “UAG” is a stop codon, which does not code for an amino acid.
Therefore, the normal DNA/mRNA sequence will produce a polypeptide consisting of 6 amino acids: methionine (Met), histidine (His), glutamine (Gln), tryptophan (Trp), isoleucine (Ile), and threonine (Thr).
More Answers:
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Understanding Silent Mutations: The DNA Point Mutation that Doesn’t Alter Amino Acid Sequence.