Question

A mutation in DNA does not always result in an error in the polypeptide produced from the DNA sequence, illustrates

• A. Some polypeptides are produced by a code other than a nucleic acid code.
• B. The nucleolus can repair damage DNA.
• C. The Golgi body can repair damaged DNA
• D. Different codons code for the same amino acid.
• E. Scientists have no idea why this phenomenon occurs.

Answer 1

The correct option is D Different codons code for the same amino acid.

Genetic code show degeneracy which means that multiple codon specify particular amino acid; asparagine is encoded by "GAU and GAC". Any mutation that alter the asparagine amino acid codon GAU to GAC would not cause any change in the polypeptide. This makes option D correct answer.