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26 Cards in this Set
- Front
- Back
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Starting with a fertilized egg (zygote), a series of five cell divisions would produce an early embryo with how many cells?
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32
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For a newly evolving protist, what would be the advantage of using eukaryote-like cell division rather than binary fission?
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Cell division would allow for the orderly and efficient segregation of multiple linear chromosomes.
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How do the daughter cells at the end of mitosis and
cytokinesis compare with their parent cell when it was in G1 of the cell cycle? |
The daughter cells have the same number of chromosomes and the same amount of DNA
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Which term describes two centrosomes arranged at opposite poles of the cell
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prometaphase
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Which term describes centrioles beginning to move apart in animal cells
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prophase
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Which is the longest of the mitotic stages?
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metaphase
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A cell containing 92 chromatids at metaphase of mitosis would, at its completion, produce two nuclei each containing how many chromosomes
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46
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If there are 20 centromeres in a cell at anaphase, how many chromosomes are there in each daughter cell following cytokinesis?
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20
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Where do the microtubules of the spindle originate during mitosis in both plant and animal cells?
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centrosome
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Which of the following are primarily responsible for cytokinesis in plant cells
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Golgi-derived vesicles
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During which phases of mitosis are chromosomes composed of two chromatids?
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from G2 of interphase through metaphase
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The somatic cells derived from a single-celled zygote divide by which process
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mitosis
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In order for anaphase to begin, which of the following must occur
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Cohesin must be cleaved enzymatically
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Why do chromosomes coil during mitosis
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to allow the chromosomes to move without becoming entangled and breaking
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Which of the following best describes how chromosomes move toward the poles of the spindle during mitosis
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Motor proteins of the kinetochores move the chromosomes along the spindle microtubules
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Cells that are in a nondividing state are in which phase?
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G0
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Which of the following is a protein maintained at constant levels throughout the cell cycle that requires cyclin to become catalytically active
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Cdk
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Which of the following triggers the cell's passage past the G2 checkpoint into mitosis
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MPF
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This is the shortest part of the cell cycle:
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M
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DNA is replicated at this time of the cell cycle
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S
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The "restriction point" occurs here
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G1
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Nerve and muscle cells are in this phase
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G0
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The cyclin component of MPF is destroyed toward the end of this phase
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M
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An enzyme that attaches a phosphate group to another molecule is called a
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kinase
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Proteins that are involved in the regulation of the cell cycle, and that show fluctuations in concentration during the cell cycle, are called
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cyclins
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A particular cell has half as much DNA as some other cells in a mitotically active tissue. The cell in question is most likely in
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G1
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