1. The Cell Cycle Test Review

2. 1. Which of the following is not a reason cells divide? A.Cells divide to reproduce asexually. B.Cells divide so a multicellular organism can grow and replace lost cells. C.Cells divide when they come in contact with other cells. D.Cells divide when the surface area to volume ratio is too small to support the cell.

3. 2. Which of the following best describes G1 of the cell cycle? A.Chromosomes replicate during G1 to form sister chromatids. B.Chromosomes are open and making protein during G1. C.Sister chromatids are lining up in the middle of the cell during G1. D.Sister chromatids are pulling apart from each other during G1.

4. 3. Which of the following best describes the Hayflick Limit? A.Every time a cell divides the telomeres get longer. Once the telomeres reach a certain length the cell stops dividing. B.Normal cells stop dividing when they bump up against other cells. C.Every time a cell divides the telomeres get shorter. Once the telomeres lose DNA that codes for a protein, the cell stops dividing or dies. D.Every time a cell divides, one cell dies and the other survives.

5. 4. Which of the following best describes Okazaki fragments? A.Okazaki fragments are used to build a leading strand in the 3’ to 5’ direction. B.Okazaki fragments are used to build the lagging strand in the 5’ to 3’ direction. C.Okazaki fragments are used to unwind the DNA molecule. D.Okazaki fragments are use to build mRNA.

6. 5. Which of the following best describe the replication of DNA. A.DNA replication is conservative. The old chromosome is conserved (saved) and a new chromosome is built during replication. B.DNA replication is semi-conservative. One half of the sister chromatid is from the original chromosome and the other half of the sister chromatid is new. C.DNA replication occurs during G1. D.DNA replication occurs during prophase.

7. 6. Felecia sees a cell without a nuclear membrane and the sister chromatids are lined up in the middle. The cell has a fully developed spindle. This cell is in ___? A.Prophase B.Interphase C.Metaphase D.Telophase

8. 7. Allie sees a cell that has a cell plate forming and appears to be forming two new nuclear membranes. Which of the following best describes this cell? A.An animal cell in anaphase. B.A plant cell in anaphase. C.An animal cell in telophase. D.A plant cell in telophase.

9. 8. Sister chromatid are present during which of the following stages? A.prophase, metaphase, S and G2 B.Prophase, metaphase, anaphase and telophase C.G1, G2, S and prophase D.G2, prophase, metaphase and telophase

10. 9. This cell is in ____. Why?

11. 10. This cell is in ____. Why?

12. 11. Which of the following best describes a proto-oncogene. A.A proto-oncogene is a gene that makes a cell exhibit uncontrollable cell division. B.A proto-oncogene is a gene that allows proteins to cause mutations in a cell that causes cancer. C.A proto-oncogene is a gene that can become an oncogene. It codes for proteins that regulate the cell cycle. D.A proto-oncogene will always mutate into an oncogene.