A scientist is trying to elucidate why a certain group of eukaryotic cells died by comparing their proteins to the proteins of similar living cells. Protein sequences show multiple stretches of incorrect amino acid sequences embedded within the polypeptide chain, which are absent in the proteins of the living cells. Which of the following describes a plausible reason for their presence?
A. The DNA primers are absent.
B. The P site in the ribosomes was damaged.
C. The start codons were missing.
D. The genetic code in these cells has been scrambled.
E. The introns of the mRNA were never removed.
Answers: 1
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