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BIO NMDCAT Structure of DNA
nmdcat.online July 3, 2026

43. The occurrence of a point mutation within a gene that changes an amino acid codon into a premature stop codon results in a

A. Missense mutation
B. Nonsense mutation
✓
C. Silent mutation
D. Neutral mutation

📝 Explanation

A nonsense mutation introduces a premature stop signal (UAA, UAG, or UGA), halting translation and yielding a truncated protein.

📖 Additional Information

  • Missense mutation
  • Nonsense mutation
  • Silent mutation
  • Neutral mutation

A nonsense mutation introduces a premature stop signal (UAA, UAG, or UGA), halting translation and yielding a truncated protein.

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