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

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.<br /><br />Step 1: Transcription<br />During 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).<br /><br />Step 2: Translation<br />During 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.<br /><br />Step 3: Single Point Mutation<br />A 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.<br /><br />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.<br /><br />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).