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Question: Answered & Verified by Expert
If there are 99 bases in an mRNA that codes for a protein with 33 amino acids and the base at position 30 undergo nonsense mutation, then what will be the length of polypeptide formed?
BiologyMolecular Basis of InheritanceNEET
Options:
  • A 11 amino acid long
  • B 30 amino acid long
  • C 9 amino acid long
  • D 29 amino acid long
Solution:
2209 Upvotes Verified Answer
The correct answer is: 9 amino acid long
99 bases long mRNA chain can specify 33 amino acid, if nonsense mutation occurs and 30 position than 10th codon becomes stop codon, as a results the new mRNA can code for a protein with only 9 amino acid as the 10th codon becomes stop codon.

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