cell cycle

5. joined copies of the original chromosome
6. accounts for ~90% of the cycle
10. the life of a cell from the time it first formed during division of a parent cell until its own division into two daughter cells
11. a control point where stop and go-ahead signals can regulate the cycle
13. reproductive cells
15. an enzyme that activate or inactivate other proteins by phosphorylating them
16. the entire complex of DNA and proteins that is the building material of chromosomes
17. the division of genetic material in the nucleus
18. reproduction of cells
19. an imaginary plate rather than an actual cell structure; a plane located midway between the spindle's two poles
20. a subcellular region containing material that functions throughout the cell cycle to organize the cell's microtubules

1. a protein released by certain cells that stimulates other cells to divide
2. the division of the cytoplasm
3. includes both mitosis and cytokinesis
4. a cell's DNA, its genetic information
7. protein that gets its name from its cyclically fluctuating concentration in the cell
8. consists of fibers made of microtubules and associated proteins
9. "division in half," refers to this process and tho the asexual reproduction of single-celled eukaryotes
10. DNA molecules are packaged into these structures
12. a structure made up of protiens that have assembled on specific sections of DNA at each centromere
14. all body cells (not reproductive cells)
18. a region made up of repetitive sequences in the chromosomal DNA where the chromatid is attached most closely to its sister chromatid