Select the proper cell parts listed below to fill in the blanks of the sentences that follow: 1. the is the semi-liquid portion of the cell in which the cell parts are located. 2. the is referred to as the headquarters of cell operation. 3. the structure found in a plant cell, but not in an animal cell, that carries out process of photosynthesis is the . 4. proteins are manufactured by the . 5. the structure that surrounds the cell and regulates what enters and leaves the cell is the . 6. nicknamed the "powerhouse of the cell", the are involved in energy production for the cell. 7. the surrounds the nucleus and controls what enters and leaves it. 8. in addition to a cell membrane, plant cells also have a that serves to provide strength and support to the cell. 9. are structures that contain digestive enzymes. 10. storage chambers within the cell are called . 11. found mostly in animal cells, the plays a role in cell division. 12. the cell structure that prepares and packages proteins either for use within the cell or for shipment out of the cell is the . 13. located within the nucleus, the is involved in making ribosomes for the cell. 14. among other tasks, the serves as a transportation system within the cell. 15. another name for the dna material located within the nucleus of the cell is .