Topic 1 Cells

4. DNA is arranged as __________________ inside animal and plant cells
5. controls what enters and exits a cell
7. movement of water molecules across a partially permeable membrane from a region of higher water concentration to a region of lower water concentration
8. cell with a single loop of DNA instead of a nucleus
11. a gas that diffuses into respiring cells
12. spreading out of a substance from a higher concentration to a lower concentration
13. green pigment that absorbs light for photosynthesis
15. cell structure that carries out aerobic respiration to release energy
16. cell structure that gives strength and support
17. movement of a substance from a lower concentration to a higher concentration; this process requires energy
18. short section of DNA that control our characteristics
19. where chemical reactions occur in a cell
21. type of cell division that makes genetically identical cells

1. cells that are adapted to absorbing substances usually have a larger _________ ________
2. cell structure that contains DNA and controls the cell's activities
3. type of microscope with a higher resolution and magnification
6. process by which a cell changes to become specialised for its job
9. before a cell undergoes mitosis, DNA ___________ has to happen
10. cell structure that makes protein
13. cell structure where photosynthesis takes place
14. extra ring of DNA inside bacteria
20. type of cell that is undifferentiated