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The Cell Cycle

The Cell Cycle . Test Review. 1. Which of the following is not a reason cells divide?. Cells divide to reproduce asexually. Cells divide so a multicellular organism can grow and replace lost cells. Cells divide when they come in contact with other cells.

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The Cell Cycle

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  1. The Cell Cycle Test Review

  2. 1. Which of the following is not a reason cells divide? • Cells divide to reproduce asexually. • Cells divide so a multicellular organism can grow and replace lost cells. • Cells divide when they come in contact with other cells. • 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? • Chromosomes replicate during G1 to form sister chromatids. • Chromosomes are open and making protein during G1. • Sister chromatids are lining up in the middle of the cell during G1. • Sister chromatids are pulling apart from each other during G1.

  4. 3. Which of the following best describes the Hayflick Limit? • Every time a cell divides the telomeres get longer. Once the telomeres reach a certain length the cell stops dividing. • Normal cells stop dividing when they bump up against other cells. • 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. • Every time a cell divides, one cell dies and the other survives.

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

  6. 5. Which of the following best describe the replication of DNA. • DNA replication is conservative. The old chromosome is conserved (saved) and a new chromosome is built during replication. • 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. • DNA replication occurs during G1. • 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 ___? • Prophase • Interphase • Metaphase • 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? • An animal cell in anaphase. • A plant cell in anaphase. • An animal cell in telophase. • A plant cell in telophase.

  9. 8. Sister chromatid are present during which of the following stages? • prophase, metaphase, S and G2 • Prophase, metaphase, anaphase and telophase • G1, G2, S and prophase • 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 proto-oncogene is a gene that makes a cell exhibit uncontrollable cell division. • A proto-oncogene is a gene that allows proteins to cause mutations in a cell that causes cancer. • A proto-oncogene is a gene that can become an oncogene. It codes for proteins that regulate the cell cycle. • A proto-oncogene will always mutate into an oncogene.

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