Question
What sequence correctly shows the sequence of organelles a protein would take if it were being exported from the cell?
Answers
GPT-4o mini
The sequence of organelles a protein would take if it were being exported from the cell is as follows:
1. **Ribosome**: The synthesis of the protein begins on ribosomes, which may be free in the cytoplasm or attached to the rough endoplasmic reticulum (RER).
2. **Rough Endoplasmic Reticulum (RER)**: Once synthesized, proteins that are meant for export are translocated into the lumen of the RER, where they undergo initial folding and modification.
3. **Transport Vesicle**: The proteins are then packaged into transport vesicles that bud off from the RER.
4. **Golgi Apparatus**: The transport vesicles fuse with the Golgi apparatus, where further modifications, sorting, and packaging of the proteins occur.
5. **Secretory Vesicle**: The Golgi apparatus packages the processed proteins into secretory vesicles, which bud off and move toward the plasma membrane.
6. **Plasma Membrane**: The secretory vesicles fuse with the plasma membrane, releasing the protein to the outside of the cell through exocytosis.
So, the correct sequence of the organelles for protein export is: **Ribosome → Rough Endoplasmic Reticulum → Transport Vesicle → Golgi Apparatus → Secretory Vesicle → Plasma Membrane**.
1. **Ribosome**: The synthesis of the protein begins on ribosomes, which may be free in the cytoplasm or attached to the rough endoplasmic reticulum (RER).
2. **Rough Endoplasmic Reticulum (RER)**: Once synthesized, proteins that are meant for export are translocated into the lumen of the RER, where they undergo initial folding and modification.
3. **Transport Vesicle**: The proteins are then packaged into transport vesicles that bud off from the RER.
4. **Golgi Apparatus**: The transport vesicles fuse with the Golgi apparatus, where further modifications, sorting, and packaging of the proteins occur.
5. **Secretory Vesicle**: The Golgi apparatus packages the processed proteins into secretory vesicles, which bud off and move toward the plasma membrane.
6. **Plasma Membrane**: The secretory vesicles fuse with the plasma membrane, releasing the protein to the outside of the cell through exocytosis.
So, the correct sequence of the organelles for protein export is: **Ribosome → Rough Endoplasmic Reticulum → Transport Vesicle → Golgi Apparatus → Secretory Vesicle → Plasma Membrane**.