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3. An enzyme speeds up the rate of a chemical reaction by ___________ the activation energy needed for the reaction.
6. How many codons code for five amino acids?
9. The process in the cell cycle in which DNA is copied
10. One problem when a cell grows too large is that its _____ increases faster than its surface area
12. dividing When normal cells are going through mitosis, what do they do when the cells touch each other?
13. What is the diffusion of water?
17. An enzyme lowers activation energy to speed up what?
18. What type of cell does NOT have a nucleus?
19. Converts glucose into ATP
21. What macromolecule's function is long term energy storage?
22. A mutation that is an insertion or deletion causes every amino acid from that point on to be changed. What's that kind of mutation called?
23. Acid What macromolecule's function is to carry genetic information?
25. In mitosis, how does the number of chromosomes in the daughter cells compare to the number in the mother cell?

1. Aparatus What organelle processes and packages substances in the cell?
2. What's the movement of particles from an area of high concentration to an area of low concentration?
4. What's the process called that can enable a one celled zygote to grow into a multi-cellular organism with many different kinds of cells?
5. What type of cell DOES have a nucleus?
7. What two factors can affect the effect of an enzyme?
8. What is the name of the process in which the cell uses info from the mRNA to produce proteins?
11. Mitosis in humans results in cells that have ______ chromosomes
14. Mitosis results in the formation of _____ genetically identical cells.
15. The amount of energy NEEDED for a chemical reaction to take place
16. What is the process by which organisms maintain a constant internal environment?
20. What macromolecule's function is to speed up the rate of chemical reactions?
24. What's the name of the proteins that regulates the cell cycle?