Cells

2. What eukaryotic cell walls are mostly made of
3. A stage where DNA replicates prior to mitosis
4. The organelle that controls the cell's activities
8. The name of cell division in prokaryotic cells
11. The fluid left at the top of the test tube during ultracentrifugation
13. The stage of mitosis where the chromatids are pulled to the poles
15. What prokaryotic cells walls are made of
16. Small cytoplasmic granules that are found in all cells and are the site of protein synthesis
17. The name of the protein that DNA is associated with in eukaryotic cells
18. The organelle that keeps cells turgid
19. Small and circular pieces of DNA

1. The organelles that carry out photosynthesis
2. Division of the cytoplasm
5. The organelle that has cristae and a matrix
6. The organelle that forms lysosomes as one of its functions
7. The stage of mitosis where chromosomes become visible
9. Protects bacterium from other cells
10. One of the important reasons for mitosis
12. The stage of mitosis where the nucleolus reforms and the spindle disintegrates
14. The stage of mitosis where spindle fibres form and chromosomes line up on the equator