3. were there any stages of the cell cycle that you did not observe? how can you explain this using evidence from the cell cycle? 4. as a cell grows, what happens to its surface area to volume ratio? (hint: think of a balloon being blown up). how does this ratio change with respect to cell division? 5. what is the function of mitosis in a cell that is about to divide? 6. what would happen if mitosis were uncontrolled? 7. how accurate were your time predictions for each stage of the cell cycle? 8. discuss one observation that you found interesting while looking at the onion root tip cells.

1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.

that's all i luck!