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BIO NMDCAT Cytoplasmic Organelles
nmdcat.online July 4, 2026

33. The transport of proteins containing a hydrophobic signal peptide into the RER is halted temporarily in the cytosol by the action of the

A. Nuclear import factor
B. Signal Recognition Particle
✓
C. Ubiquitin ligase system
D. Chaperonin folding cage

📝 Explanation

The Signal Recognition Particle halts translation temporarily to prevent premature protein folding in the cytosol before docking at the RER translocon.

📖 Additional Information

  • Nuclear import factor
  • Signal Recognition Particle
  • Ubiquitin ligase system
  • Chaperonin folding cage

The Signal Recognition Particle halts translation temporarily to prevent premature protein folding in the cytosol before docking at the RER translocon.

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