Biology Chapter 9 Study Guides

Flashcard maker : Lily Taylor
List two alternative futures for cells when they reach their size limitations.
1. die
2. divide

stage in which the cell divides into two daughter cells with identical nuclei
b. cytokinesis

substage of interphase immediately after a cell divides
C. G1

substage of interphase in which the cell copies its DNA in preparation for cell division
A. S phase

stage in which the cell’s nuclear material divides and separates
F. mitosis

main stage in which the cell grows, carries out normal functions, and duplicates its DNA
E. interphase

substage in which the cell prepares for nuclear division and a protein that makes microtubules for cell division is synthesized
D. G2

The nuclear membrane disintegrates during prophase.
true

Microtubules move chromatids to the poles of the cell during anaphase.
true

Chromosomes reach the poles of the cell during metaphase.
false

The cell’s chromatin condenses into chromosomes during prophase.
true

The nuclear envelope re-forms during anaphase.
false

Chromosomes attach to spindle fibers and line up along the equator of the cell during metaphase.
true

The nucleus reappears during prophase.
false

Centrioles migrate to the poles of the cell during telophase.
false

Chromatids are pulled apart during anaphase.
true

The first stage of mitosis is telophase.
false

The chromosomes de-condense or unwind during telophase.
true

The shortest stage of mitosis is metaphase.
true

Label the diagram of the stages of mitosis using lines 13-16.
13. metaphase
14. anaphase
15. telophase
16. prophase

Label the diagrams above using lines 17-20.
17. sister chromatids
18. centromere
19. spindle fibers
20. centrioles

Discuss the role of microfilaments in cytokinesis.
Microfilaments are used in animals to accomplish cytokinesis by constricting or pinching the cytoplasm.

Summarize cell division in prokaryotes.
1. goes through binary fission
2. when prokaryotic DNA is duplicated, both copies attach to the plasma membrane
3. As plasma membrane grows the attached DNA molecules are pulled apart.
4. Cell completes fission and the results: 2 new cells

Cancer is the uncontrolled growth and division of ..
cells

Cancer is the uncontrolled growth and division of cells that is often prevented by cell-cycle checkpoints that monitor for..
DNA damage or spindle fiber failure

Cancer is the uncontrolled growth and division of cells that is often prevented by cell-cycle checkpoints that monitor for DNA damage or spindle fiber failure and stop the ..
cell cycle before cytokinesis

Cancer is the uncontrolled growth and division of cells that is caused by un-repaired..
genetic changes

Cancer is the uncontrolled growth and division of cells that is caused by exposure to..
carcinogens

Cancer is the uncontrolled growth and division of cells that is caused by exposure to carcinogens such as …
tobacco, excessive x rays, or the Sun’s ultraviolet rays

Interphase
longest part of the cell cycle, G1, S, G2

G1
cell grows and performs normal function

Synthesis (S)
building DNA (replicating)

G2
cell prepares for mitosis

Mitosis
nucleus and nuclear material divide

cytokinesis
cells cytoplasm divides, creating new cell

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