Cell Biology

6. a small sphere in the center of the nucleus; it makes ribosomes
8. the powerhouse of the cell (organelle)
11. a storage sac in the cell; in PLANT cells, a large one holds water
12. tiny hair-like structures on the outside of some cells
14. a thick and strong extra layer around the outside of PLANT cells (cell part)
15. the process in PLANT cells where they use sunlight energy to make glucose; happens in the chloroplasts
17. water molecules moving across a membrane from an area of high concentration to an area of low concentration
19. cell __________; a barrier that goes around the cell and separates the inside of a cell from the outside (cell part)
20. the garbage collector of the cell; it breaks down worn out cell parts (organelle)
21. __________ transport; needs ATP energy to move molecules against the concentration gradient
22. a passageway for proteins; it has ribosomes attached to it (organelle)
23. long tails on the outside of some cells that help the cell move or swim

1. molecules moving from an area of high concentration to an area of low concentration
2. the jelly-like fluid inside a cell; the organelles float around in it (cell part)
3. cellular ______________; the process of making ATP energy in the mitochondria from glucose and oxygen
4. it does photosynthesis in PLANT cells; it is what makes plant leaves green (organelle)
5. _______ body; where proteins get customized before being sent out of the cell
7. ___________ transport; molecules move on their own (without energy) through the cell membrane or through protein channels
9. the "brain" or control center of the cell; it has the DNA inside (organelle)
10. the tangled, spread out form of DNA
13. microtubules and microfilaments; it helps the cell keep its shape
16. tiny organelles that makes proteins; either floating freely or attached to the rough ER
18. a passageway for proteins; it doesn't have ribosomes attached (organelle)