Answer: C) Serine would change to Stop
Explanation:
The given codon UCA codes for the amino acid serine in the genetic code. However, the mutation UCA to UAA is a stop codon (also known as an amber codon), which signals the end of protein synthesis. In this case, the mutation changes the amino acid-coding sequence to a stop signal, leading to premature termination of protein synthesis. This often results in a nonfunctional or truncated protein.