Biology Terms

2. found only in plant cells; trap energy from the Sun to make glucose, which is broken down in the mitochondria to power cell activities.
6. filaments and tubules that provide a framework for the cell, helping it maintain its structure and providing "tracks" along which vesicles and organelles can move.
7. the movement of water molecules across a membrane in response to concentration differences.
8. the stage in the cell cycle when the cytoplasm and organelles divide into two identical, separate cells.
10. the stage in the cell cycle when the contents of the nucleus separate into two identical copies.
13. the movement of molecules from an area of high concentration to an area of low concentration until they are evenly distributed.
14. a structure within a cell that carries out specific functions to support the life of the cell.

1. sorts and packages proteins and other molecules for transport out of the cell.
2. the number of molecules of a substance in a given volume.
3. controls all cell activities.
4. where energy is released from glucose to fuel cell activities.
5. the ability to grow new cells to replace damaged or lost body components.
9. the stage in the cell cycle when a cell grows and carries out its usual functions, as well as making a copy of its DNA and organelles to prepare for cell division.
11. includes the organelles, and other life-supporting materials, such as sugar and water, all contained by the cell membrane.
12. a tough, rigid structure lying just outside a plants cell's membrane; provides support for the cell; not found in animal cells.