Final answer:
Protein function can be affected by single nucleotide changes in the DNA template sequence.
Step-by-step explanation:
Protein function is determined by the sequence of amino acids that make up the protein. In the given DNA template sequences, Sequence 1: TACGCTACGATCGTA and Sequence 2: TACGCTACTATCGTA, a single nucleotide change occurs. This change can result in a different amino acid being incorporated into the protein sequence, leading to a different protein with potentially different structure and function. For example, if the nucleotide change leads to a change in the codon coding for an amino acid at a critical functional site, it could alter the function of the protein. Therefore, in this case, the function of protein 2 might differ from the function of protein 1 due to the single nucleotide change in the DNA template sequence.