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nmdcat.online June 27, 2026

A point mutation in a gene changes a codon for arginine (CGA) to a codon for alanine (GCA). This specific type of substitution is classified as a

A. Silent mutation
B. Missense mutation
✓
C. Nonsense mutation
D. Frame-shift mutation

📝 Explanation

A missense mutation is a single nucleotide change that results in a codon for a different amino acid. Here, arginine is replaced by alanine, which will likely alter the protein's primary structure and potentially its function. A silent mutation codes for the same amino acid.

📖 Additional Information

  • Silent mutation
  • Missense mutation
  • Nonsense mutation
  • Frame-shift mutation

A missense mutation is a single nucleotide change that results in a codon for a different amino acid. Here, arginine is replaced by alanine, which will likely alter the protein's primary structure and potentially its function. A silent mutation codes for the same amino acid.

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