BIO Unit 3

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Author:
sgordo48
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73283
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BIO Unit 3
Updated:
2011-03-27 20:10:44
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Cell Cycle Mitosis
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Biological Perspectives
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  1. What is Interphase?
    The active preparation for cell division
  2. What are the phases of Mitosis in order?
    Prophase, Metaphase, Anaphase, and Telophase
  3. How does a cell prepare for cell division?
    Increases its size and makes a copy of its' DNA
  4. What does G1 stand for in interphase stage of the cell cycle?
    Gap 1 or presynthesis
  5. What does S stand for in interphase stage of the cell cycle?
    Synthesis
  6. What does G2 stand for in the interphase stage of the cell cycle?
    Gap 2 or postsynthesis
  7. What does the M stand for in the cell cycle?
    Mitotic division phase
  8. What type of cell does NOT have centrosomes?
    Plant cells
  9. What disappears during Prophase?
    Nucleolus
  10. What disappears at the end of Prophase?
    Nuclear envelope
  11. How many chromosomes are in the human cell?
    46 (23 pairs)
  12. What type of reproduction is mitosis?
    Asexual reproduction
  13. What type of reproduction is meiosis?
    Sexual reproduction
  14. What does G0 indicate in the cell cycle?
    cell activity that only occurs in G1
  15. What is the central area where 2 chromatid sisters connect to form 1 chromosome?
    Centromere
  16. What is Cytokinesis?
    The division of everything else in the cell
  17. How many chromosomes does an egg and sperm each have?
    23 chromosomes
  18. How does an aster form?
    Microtubules extend from the centrosomes radially to form an aster
  19. During what stage of mitosis do spindle fiber attach to the kinetochores of the chromosomes?
    Metaphase
  20. During what stage of mitosis do chromatids seperate at their centromeres?
    Anaphase
  21. During what stage of mitosis does 1 group of chromosomes move toward each pole?
    Anaphase
  22. During what stage of mitosis does the nuclei reform and cell division is complete as cytokinesis produces 2 daughter cells?
    Telophase
  23. During Interphase, what is the only difference between daughter cells and the parent cells?
    It is smaller in size
  24. During what stage of mitosis do chromosomes line up along the equatorial plane of the cell?
    Metaphase
  25. During what stage of mitosis do spindles form between the centrioles which have moved to the poles of the cell?
    Prophase (Late)
  26. During what stage of mitosis do chromosomes continue to shorten and thicken?
    Prophase (Late)
  27. During what stage of mitosis do long thread-like bodies of chromatin become evident and begin to condense as visible chromosomes?
    Prophase (Early)
  28. What period of Interphase are chromosomes replicated?
    S phase
  29. What are the phases of Interphase in order?
    Mitotic Division (M),Presynthesis (G1), Synthesis (S), and Postsynthesis (G2)
  30. The timing of the cell cycle in eukaryotic cells is controlled by a group of closely related proteins called what?
    Cyclins
  31. What is the period of Interphase in which DNA replication is completed and the cell is ready to begin the process of cell division?
    Postsynthesis (G2)
  32. Are there tetrads in mitosis?
    No
  33. What are polar fibers?
    Spindle microtubules that extend from 2 poles of a dividing cell
  34. What is another word for a non-sex cell?
    Somatic cell
  35. What kind of cells make up most of the cells in the human body?
    Somatic cells (Non-sex cells)
  36. During what stage of the cell cycle are protein tublin produced?
    Interphase
  37. What is the purpose of mitosis?
    To turn dyads into unduplicated DNA
  38. What is kinetochore?
    protein found in chromatid that attach to microtubules
  39. What is binary fission?
    The process in which prokaryotic cells reproduce asexually
  40. In animal cells, cytokineses is carried out through what?
    Cleavage furrow
  41. In plant cells, cytokinesis is carried out through what?
    Cell plate
  42. If their are 12 chromatids, how many diploids are there?
    12

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