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

17. The modification added to the 5′ end of eukaryotic pre-mRNA during processing is a

A. Poly-A tail
B. 7-methylguanosine cap
✓
C. CCA sequence
D. Intron loop

📝 Explanation

The 5' cap protects the transcript from exonuclease degradation and assists in ribosome binding during translation initiation.

📖 Additional Information

  • Poly-A tail
  • 7-methylguanosine cap
  • CCA sequence
  • Intron loop

The 5' cap protects the transcript from exonuclease degradation and assists in ribosome binding during translation initiation.

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