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BIO NMDCAT Ribonucleic acid (RNA)
nmdcat.online July 3, 2026

87. A synthetic polynucleotide consisting solely of repeating uracil residues (poly-U) is introduced into an in vitro translation system containing all necessary cellular components. The resulting polypeptide chain generated from this template will consist entirely of

A. Lysine residues
B. Glycine residues
C. Phenylalanine residues
✓
D. Methionine residues

📝 Explanation

In historical genetic code experiments, UUU was discovered to be the specific codon that codes for the amino acid phenylalanine.

📖 Additional Information

  • Lysine residues
  • Glycine residues
  • Phenylalanine residues
  • Methionine residues

In historical genetic code experiments, UUU was discovered to be the specific codon that codes for the amino acid phenylalanine.

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86. An experimental system containing a mutant eukaryotic cell line fails to process pre-rRNA into mature 18S and 28S ribosomal components. A structural analysis reveals a defect in a class of non-coding RNAs that orchestrate the methylation and cleavage of the primary ribosomal transcript. The group of RNA molecules defective in this cell line is the

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