Final answer:
The rudder-like protrusion develops after rNTP and RNA exit from the nucleus. Ribosomal RNA (rRNA) is synthesized in the nucleolus and together with ribosomal proteins forms ribosomes. These ribosomal subunits exit the nucleus to participate in protein synthesis.
Step-by-step explanation:
A rudder-like protrusion develops after ribonucleotide triphosphate (rNTP) and RNA exit from the nucleus. This process is part of the cellular mechanism where DNA is transcribed into RNA, which then exits the nucleus to be used in protein synthesis. The endomembrane system, which includes the rough endoplasmic reticulum (ER), processes and ships proteins specified by the nucleus. The ribosomes, some of which are situated on the rough ER, utilize the RNA to synthesize proteins. Notably, the ribosomal RNA (rRNA) components of ribosomes are synthesized in the nucleolus, after which they are assembled with ribosomal proteins to form the large and small subunits of ribosomes. These subunits exit the nucleus to meet with messenger RNA (mRNA) in the cytoplasm for protein translation.