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

28. The molecular feature that prevents the human gene for insulin from being translated accurately inside a bacterial cell without prior modification is the

A. Difference in the universal genetic code
B. Presence of introns within the human genomic DNA sequence
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C. Inability of bacteria to form peptide bonds
D. Complete absence of ribosomes in prokaryotes

📝 Explanation

Human genes contain introns, which bacteria cannot slice out because they lack spliceosomes, leading to a flawed, non-functional protein.

📖 Additional Information

  • Difference in the universal genetic code
  • Presence of introns within the human genomic DNA sequence
  • Inability of bacteria to form peptide bonds
  • Complete absence of ribosomes in prokaryotes

Human genes contain introns, which bacteria cannot slice out because they lack spliceosomes, leading to a flawed, non-functional protein.

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