Five strands of mRNA are depicted here, numbered 1-5 The mRNA sequence labeled number 1 indicates the codons that result from the transcription of the original, unmutated DNA.Which numbered sequence indicates a single point mutation that results in a substituted amino acid in one location along the protein? A 2 B 3 C 4 D 5

Question

Five strands of mRNA are depicted here, numbered 1-5 The mRNA sequence labeled number 1 indicates the codons that result from the transcription of the original, unmutated DNA.Which numbered sequence indicates a single point mutation that results in a substituted amino acid in one location along the protein? A 2 B 3 C 4 D 5

Answer 1

To determine which numbered sequence indicates a single point mutation that results in a substituted amino acid in one location along the protein, we need to understand the process of transcription and translation.Step 1: TranscriptionDuring transcription, the DNA sequence is copied into mRNA. The mRNA sequence is complementary to the DNA sequence, with the exception that uracil (U) is used instead of thymine (T).Step 2: TranslationDuring translation, the mRNA sequence is read by the ribosome, and each set of three nucleotides (codon) codes for a specific amino acid. The sequence of amino acids determines the structure and function of the protein.Step 3: Single Point MutationA single point mutation is a change in a single nucleotide in the DNA sequence. This change can result in a different amino acid being incorporated into the protein during translation.Given that the mRNA sequence labeled number 1 indicates the codons that result from the transcription of the original, unmutated DNA, we need to identify the sequence that indicates a single point mutation.Answer: The numbered sequence that indicates a single point mutation resulting in a substituted amino acid in one location along the protein is sequence 4 (Option C).

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