Here's how ribosomes get to their destination:
* Newly assembled ribosomes exit the nucleus through nuclear pores.
* Free ribosomes float in the cytoplasm and can either:
* Synthesize proteins destined to remain in the cytoplasm.
* Attach to the endoplasmic reticulum (ER), forming rough ER.
* Ribosomes attached to the ER synthesize proteins that will be:
* Secreted outside the cell.
* Delivered to other organelles.
* Become part of the cell membrane.
Therefore, it's not about a specific transport mechanism like vesicles or motor proteins, but rather about the ribosomes themselves moving freely or attaching to the ER based on the type of protein they are going to synthesize.
