Both bacteria and eukaryotes
  • Before seperation, duplicated chromosomes condense.Nuclear envelope fragments, permitting chromosome separation.Two copies of the duplicated chromosomes are attached at their centromeres before separating.
  • metaphase interphase prometaphase prophase anaphase
  • Cohesin join sister chromatids of duplicated chromosomes.Tubulins assumble into spindle microtubules
  • Replicated chromosomes seperate by attaching to some other structural feature of the cell.Chromosomes replicate before cell division.
After chromosomes condense, the __________ is the region where the identical DNA molecules are most tightly attached to each other.
  • Chromatin
  • Centromere(s)
  • centrosome(s)
  • NoNoNoYesYes
The _________________ is a cells structure consisting of microtubules, which forms during early mitosis and plays a role in cell division.
  • NoYesYes YesNo
  • Mitotic spindle begins to form
  • centrosome(s)
  • Mitotic spindle(s)
Are sister chromatids present in all or part of this phase:G1SG2Beginning of M( Prophase -> early Anaphase)End of M (late Anaphase -> telophase)
  • NoNoNoYesYes
  • NoYesYes YesNo
  • FalseFalseTrue
  • NoYesYesYesYes
Cytokinesis in animal cells is accomplished by constriction of the cell along the plane of cell division (formation of a cleavage furrow). In plant cells, which have cell walls, a completely different mechanism of cytokinesis has evolved.Which of the following statements are true of cytokinesis in plant cells? Select the two that apply.
  • After chromosome separation is complete, a network of microfilaments forms near the plane of cell division that will separate the two new cells.* Vesicles from the Golgi apparatus move along microtubules, coalesce at the plane of cell division, and form a cell plate. The cell plate consists of the plasma membrane and cell wall that will eventually separate the two daughter cells.* The plasma membrane of the parent cell grows inward, eventually joining with the cell plate
  • prometaphase anaphase interphase telophase metaphase
  • Two chromosomes and four chromatids.
  • formation of the cell plate binary fission formation of the mitotic spindle cleavage DNA replication
S Phase
  • DNA replication
  • Non-diving cells exit cell cycle
  • Centrosome replicates
  • Mitotic spindle begins to form
During prohpase a homologous pair of chromosomes consists of _______>
  • Two chromosomes and four chromatids.
  • Kinetochore(s)
  • mitosis cytokinesis interphase S G1
  • G2 the mitotic phase mitosis S G1
Cell divide by constriction of a ring of protein.BacteriaAnimalsPlants
  • TrueTrueFalse
  • FalseFalseTrue
  • TrueFalseTrue
  • Kinetochore(s)
Tubulin or tubulin-like molecules function in binary fission (in bacteria) or cytokinesis (in animals and plants).BacteriaAnimalsPlants
  • FalseFalseTrue
  • NoYesYes YesNo
  • TrueTrueFalse
  • TrueFalseTrue
G1 Phase
  • Cohesin join sister chromatids of duplicated chromosomes.Tubulins assumble into spindle microtubules
  • Non-diving cells exit cell cycle
  • DNA replication
  • Spindle microtubules disassemble.
Is the DNA condensed in all or part of this phase?G1SG2Beginning of M( Prophase -> early Anaphase)End of M (late Anaphase -> telophase)
  • NoNoNoYesYes
  • NoYesYesYesYes
  • NoYesYes YesNo
  • FalseFalseTrue
The presence of cell wall prevents the cell from dividing by constriction.BacteriaAnimalsPlants
  • Sister chromatids
  • TrueFalseTrue
  • NoYesYes YesNo
  • FalseFalseTrue
Eukaryotes only
  • Chromsome separation begins at the origin of replication on DNA
  • Before seperation, duplicated chromosomes condense.Nuclear envelope fragments, permitting chromosome separation.Two copies of the duplicated chromosomes are attached at their centromeres before separating.
  • At this point, cell commits to go through the cycle
  • Kinetochores are motionless in relation to poles of cell
Diagram showing the motor protein of a kinetochore, whose function has been blocked due to the effect of an inhibitor.Will this cell elongate during mitosis?Will the sister chromatids separate from each other?Will the chromosomes move to the poles of the cells?
  • YesYesNo
  • Cytokinesis
  • NoYesYesYesYes
  • NoNoNoYesYes
M Checkpoint
  • Kinetochores are motionless in relation to poles of cell
  • Non-diving cells exit cell cycle
  • Cell divides, forming two daughter cells
  • At this point, cell commits to go through the cycle
G2 Phase
  • DNA replication
  • Centrosome replicates
  • Non-diving cells exit cell cycle
  • Mitotic spindle begins to form
During telophase, the nonkinetochore microtubules _________.
  • Disassemble
  • Kinetochore(s)
  • Chromatin
  • Interphase
Prophase
  • Cohesin join sister chromatids of duplicated chromosomes.Tubulins assumble into spindle microtubules
  • Cohesins break down.Kinetochores move toward poles of cell.
  • Mitotic spindle begins to form
  • Kinetochores are motionless in relation to poles of cell
During prophase, the microtubules of the mitotic spindle ______.
  • Kinetochore(s)
  • Disassemble
  • Lengthen
  • Lengthen , Shorten
During anaphase, the nonkinetochore microtubules _______ and move past each other, and the kinetochore microtubules _________.
  • NoNoNoYesYes
  • Kinetochore(s)
  • Disassemble
  • Lengthen , Shorten
G1 Checkpoint
  • anaphase interphase telophase metaphase prometaphase
  • Chromsome separation begins at the origin of replication on DNA
  • At this point, cell commits to go through the cycle
  • metaphase interphase prometaphase prophase anaphase
In dividing cells, most of the cell's growth occurs during _________.
  • Kinetochore(s)
  • Disassemble
  • Interphase
  • TrueTrueFalse
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