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Ch 12 Biology

40 Questions
Biology Quizzes & Trivia

Mitosis and sister chromatids. 5 phases of division.

Questions and Answers
  • 1. 
    During ________ both the contents of the nucleus and the cytoplasm are divided.
    • A. 

      Mitotic phase

    • B. 

      Mitosis

    • C. 

      G2

    • D. 

      G1

    • E. 

      S

  • 2. 
    During ________ the cell grows and replicates both its organelles and its chromosomes
    • A. 

      Cytokinesis

    • B. 

      S

    • C. 

      Mitosis

    • D. 

      Interphase

    • E. 

      G1

  • 3. 
    What event does NOT take place before the star of mitosis?
    • A. 

      Organelle proliferate

    • B. 

      DNA is replicated

    • C. 

      The nuclear envelope disintegrates

    • D. 

      The parent cell grows

  • 4. 
    True or False? Mitosis takes place during the M phase, which is the longest phase of the cell cycle.
    • A. 

      True

    • B. 

      False

  • 5. 
    Which term describes two recently replicated DNA strands that are joined together just before cell division?
    • A. 

      Centromere

    • B. 

      Centrosome

    • C. 

      Sister Chromatid

    • D. 

      Centriole

  • 6. 
    During which stage of mitosis are chromosome slined up in the center of the cell
    • A. 

      Anaphase

    • B. 

      Telophase

    • C. 

      Metaphase

    • D. 

      Prophase

  • 7. 
    Which stage of mitosis is characterized by the didintegration of mitotic spindles and the formation of the two new nuclear membranes?
    • A. 

      Metaphase

    • B. 

      Prophase

    • C. 

      Telophase

    • D. 

      Anaphase

  • 8. 
    To which part of the centromere do mitotic spindle fibers attach during prometaphase
    • A. 

      Microtubule

    • B. 

      Kinetochore

    • C. 

      Chromosome

    • D. 

      Centriole

  • 9. 
    During which substage of mitosis do sister chromatids break apart and start moving to opposite poles of the cell?
    • A. 

      Telophase

    • B. 

      Metaphase

    • C. 

      Prophase

    • D. 

      Anaphase

  • 10. 
    Which of the following is a function of the S phase in the cell cycle?
    • A. 

      The separation of sister chromatids

    • B. 

      The sorting of chromosomes

    • C. 

      The synchronization of organelle division

    • D. 

      The synthesis of sister chromatids

  • 11. 
    The copying of chromosomes occurs during which of the following phases of the cell cycle?
    • A. 

      S pahse

    • B. 

      G2 phase

    • C. 

      M phase

    • D. 

      G1 phase

  • 12. 
    For the first several divisions of early frog embryos, cells proceed directly from the M phase to the S phase and back to M without gaps. Which of the following is likely to be true about dividing cells in early frog embryos?
    • A. 

      The cells get smaller with each generation

    • B. 

      The cells do not divide by mitosis.

    • C. 

      The number of chromosomes decreases with each generation

    • D. 

      Frog embryos do not have DNA.

  • 13. 
    True or false? The M phase is characterized by the replication and division of a cell's chromosomes.
    • A. 

      True

    • B. 

      False

  • 14. 
    If an organism normally has 34 chromosomes, how many molecules of DNA should there be in the G1 phase of the cell cycle?
    • A. 

      34

    • B. 

      68

    • C. 

      17

    • D. 

      136

  • 15. 
    Which of the following events would cause the cell cycle to arrest?
    • A. 

      Complete chromosome replication

    • B. 

      Synthesis of cyclins by growth factors and activation of a cyclin-Cdk complex

    • C. 

      Chromosomes lined up along the metaphase plate

    • D. 

      Poor nutrient conditions

  • 16. 
    Nucleoli are present during _____.
    • A. 

      Interphase

    • B. 

      Metaphase

    • C. 

      Prophase

    • D. 

      Prometaphse

    • E. 

      Anaphase

  • 17. 
    Cytokinesis often, but not always, accompanies _____.
    • A. 

      Metaphase

    • B. 

      Prometaphase

    • C. 

      Telephase

    • D. 

      Interphase

    • E. 

      Anaphase

  • 18. 
    Chromosomes become visible during _____.
    • A. 

      Interphase

    • B. 

      Metaphase

    • C. 

      Prometaphase

    • D. 

      Prophase

    • E. 

      Anaphase

  • 19. 
    Centromeres divide and sister chromosomes become full-fledged chromosomes during _____.
    • A. 

      Telopohase

    • B. 

      Anaphase

    • C. 

      Metaphase

    • D. 

      Prometaphase

    • E. 

      Interphase

  • 20. 
    Spindle fibers attach to kinetochores during _____.
    • A. 

      Interphase

    • B. 

      Anaphase

    • C. 

      Metaphase

    • D. 

      Telophase

    • E. 

      Prometaphase

  • 21. 
    During prophase a homologous pair of chromosomes consists of _____.
    • A. 

      Two chromosomes and two chromatids

    • B. 

      One chromosome and four chromatids

    • C. 

      One chromosome and two chromatids

    • D. 

      Four chromosomes and two chromatids

    • E. 

      Two chromosomes and four chromatids

  • 22. 
    Http://media.pearsoncmg.com/bc/bc_campbell_biology_8/img/activities_quizzes/1211q.swfThis animation illustrates the events of _____.
    • A. 

      Metaphase

    • B. 

      Interphase

    • C. 

      Prophase

    • D. 

      Anaphase

    • E. 

      Telophase

  • 23. 
    Http://media.pearsoncmg.com/bc/bc_campbell_biology_8/img/activities_quizzes/1212q.swfThis animation illustrates the events of _____.
    • A. 

      Metaphase

    • B. 

      Cytokinesis as it occurs in animal cells

    • C. 

      Prometaphase

    • D. 

      Cytokinesis as it occurs in plant cells

    • E. 

      Prophase

  • 24. 
    Http://media.pearsoncmg.com/bc/bc_campbell_biology_8/img/activities_quizzes/1213q.swf This animation illustrates the events of _____.
    • A. 

      Anaphase

    • B. 

      Prometaphase

    • C. 

      Interphase

    • D. 

      Prophase

    • E. 

      Telophase

  • 25. 
    Http://media.pearsoncmg.com/bc/bc_campbell_biology_8/img/activities_quizzes/1214q.swf this illustrates the events of ________.
    • A. 

      Metaphase

    • B. 

      Telophase

    • C. 

      Prophase

    • D. 

      Anaphase

    • E. 

      Prometaphase

  • 26. 
    Http://media.pearsoncmg.com/bc/bc_campbell_biology_8/img/activities_quizzes/1215q.swf this illustrates the events of ________.
    • A. 

      Cytokinesis as it occurs in plant cells

    • B. 

      Interphase

    • C. 

      Metaphase

    • D. 

      Prometaphase

    • E. 

      Anaphase

  • 27. 
    Http://media.pearsoncmg.com/bc/bc_campbell_biology_8/img/activities_quizzes/1216q.swf this illustrates the events of _________.
    • A. 

      Metaphase

    • B. 

      Prometaphase

    • C. 

      Anaphase

    • D. 

      Prophase

    • E. 

      Cytokinesis as it occurs in plant cells

  • 28. 
    Http://media.pearsoncmg.com/bc/bc_campbell_biology_8/img/activities_quizzes/1217q.swf this illustrates the events of ________.
    • A. 

      Telophase

    • B. 

      Metaphase

    • C. 

      Prophase

    • D. 

      Anaphase

    • E. 

      Prometaphase

  • 29. 
    Which of the following is a function of meiosis but not mitosis in eukaryotes?
    • A. 

      Production of animal gametes

    • B. 

      Repair of damaged organs

    • C. 

      Cell replacement

    • D. 

      Asexual reproduction

    • E. 

      Growth

  • 30. 
    A human bone marrow cell, in prophase of mitosis, contains 46 chromosomes. How many chromatids does it contain
    • A. 

      92

    • B. 

      23

    • C. 

      46

    • D. 

      23 or 46, depending on the portion of prophase examined

    • E. 

      46 or 92, depending on the portion of prophase examined

  • 31. 
    It is difficult to observe individual chromosomes with a light microscope during interphase because _____.
    • A. 

      They leave the nucleus and are dispersed to other parts of the cell

    • B. 

      Sister chromatids do not pair up until division starts

    • C. 

      The DNA has not been replicated yet

    • D. 

      They have uncoiled to form long, thin strands

    • E. 

      The spindle must move them to the metaphase plate before they become visible

  • 32. 
    The kinetochores _____.
    • A. 

      Of each spindle interdigitate at the cell's equator and then move apart, causing the cell to elongate

    • B. 

      Are the primary centromere structures that maintain the attachment of the sister chromatids prior to mitosis

    • C. 

      Attach to the ring of actin along the cytoplasmic surface of the plasma membrane, causing the actin to contract to form the cleavage furrow

    • D. 

      Are sites at which microtubules attach to chromosomes

    • E. 

      Are located at the center of the centrosome; their function is to organize tubulin into elongated bundles called spindle fibers

  • 33. 
    Which of the following correctly matches a phase of the cell cycle with its description?
    • A. 

      S: immediately precedes cell division

    • B. 

      G2: cell division

    • C. 

      M: duplication of DNA

    • D. 

      G1: follows cell division

    • E. 

      All of the above are correctly matched.

  • 34. 
    In some organisms such as certain fungi and algae, cells undergo the cell cycle repeatedly without subsequently undergoing cytokinesis. What would result from this?
    • A. 

      Inability to duplicate DNA

    • B. 

      Large cells containing many nuclei

    • C. 

      Division of the organism into many cells, most lacking nuclei

    • D. 

      A decrease in chromosome number

    • E. 

      A rapid rate of gamete production

  • 35. 
    Which of the following is/are difference(s) between the fission of a bacterium and mitosis in human cells?
    • A. 

      Duplicated bacterial chromosomes attach to the plasma membrane. Duplicated human chromosomes are attached to each other.

    • B. 

      Bacteria are smaller and simpler than human cells.

    • C. 

      Human chromosomes are larger and more complex.

    • D. 

      A bacterium has only one chromosome, human chromosomes are paired.

    • E. 

      All of the above are differences between the fission of a bacterium and human cell division.

  • 36. 
    Cytochalasin B is a chemical that disrupts microfilament formation. This chemical would interfere with _____.
    • A. 

      Formation of the mitotic spindle

    • B. 

      Binary fission

    • C. 

      Cleavage

    • D. 

      Formation of the cell plate

    • E. 

      DNA replication

  • 37. 
    Cells will usually divide if they receive the proper signal at a checkpoint in the _____ phase of the cell cycle
    • A. 

      Cytokinesis

    • B. 

      M

    • C. 

      G2

    • D. 

      G1

    • E. 

      S

  • 38. 
    A benign tumor, but not a malignant tumor, is one in which the cancerous cells _____.
    • A. 

      Have an unusual number of chromosomes

    • B. 

      Migrate from the initial site of transformation to other organs or tissues

    • C. 

      Remain confined to their original site

    • D. 

      Are the result of the transformation of normal cells

    • E. 

      Can divide indefinitely if an adequate supply of nutrients is available

  • 39. 
    Which of these is NOT a carcinogen?
    • A. 

      UV light

    • B. 

      Testosterone

    • C. 

      Cigarette smoke

    • D. 

      Fat

    • E. 

      All of the above are carcinogens

  • 40. 
    _____ is a carcinogen that promotes colon cancer.
    • A. 

      Fat

    • B. 

      UV light

    • C. 

      Estrogen

    • D. 

      A virus

    • E. 

      Testosterone