Question

Q57. In which direction do sister chromatids move during anaphase?A.)They move toward the middle of the parent cell, at or near the midline.B.)Each sister chromatid moves toward the center of the spindle pole it is attached to.C.)They move toward each other.D.) Sister chromatids separate and move in metaphase, not anaphase.Q58. Why does the nuclear envelope dissolve during mitosis?*Check all that apply*:To allow the spindle to attach to chromosomes.To allow DNA to condense into chromosomes.To allow sister chromatids to move to opposite sides of the cell.To allow spindles to move to opposite sides of the cell.Q59. What would happen if DNA was not condensed into chromosomes during mitosis?A.)DNA would not be replicated.B.)The spindle would not form.C.)DNA could become tangled or tear while moving to opposite sides of the cell.D.)All of the above.Q60. The drug colchicine prevents microtubules from forming or growing. Which statement below of colchicine-treated cells in mitosis is FALSE?A.)Mitosis proceeds normally until the end of metaphase.B.) Colchicine disrupts mitosis in cancerous and noncancerous cells.C.) Chromosomes condense and the nuclear envelope dissolves normally.D.) The spindle will not attach to chromosomes.Q61. Suppose a cell lacked kinetochores, but produced otherwise normal chromosomes. In which stage would mitosis arrest?A.)ProphaseB.)PrometaphaseC.)MetaphaseD.)AnaphaseQ62. Imagine an animal cell was unable to break down its nuclear envelope during mitosis, so microtubules could not pierce the nuclear envelope. The cell is otherwise normal. In which stage would mitosis arrest?A.) ProphaseB.) PrometaphaseC.) MetaphaseD.) The cell would complete mitosis but would produce aneuploid daughter cells.Q63. A cell attempts mitosis with only one spindle pole (with many microtubules), but is otherwise normal. Which of the following is true for this cell?A.)The spindle would never attach to kinetochores.B.) f the drug Taxol were administered, the spindle would be unaffected.C.) The cell would begin but not complete telophase.D.)The cell would not be able to enter anaphase.Q64. Which of the following events occur after the nuclear envelope dissolves?Check all that apply:A.) DNA condenses into chromosomes.B.) Chromosomes align at the midline of the cell.C.) Cohesin dissolves.D.)Sister chromatids move to opposite sides of the cell.Q65. Which of the following are made of or contain DNA?Check all that apply:A.)ChromosomesB.) CohesinC.)KinetochoresD.) MicrotubulesQ66. Which of the following is a microtubule organizing center?A.) ChromosomeB.) CentrosomeC.) CentromereD.) None of theseQ67. How does the spindle move sister chromatids during anaphase?A.) Sister chromatids are pushed together, away from spindle poles.B.)Sister chromatids are pulled toward the spindle poles.C.)Spindle microtubules engage in a tug-of-war that centers chromosomes at the midline.D.) None of the above. Spindles do not use mechanical forces.