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Biology Chapter 9
9
Question | Answer |
---|---|
cycle of growing and dividing cells | cell cycle |
stage during which the cell grows, carries out cellular functions, and replicates or makes copies of it's DNA in preparation for the next stage of the cycle | interphase |
stage of the cell cycle during which the cell's nucleus and nuclear material divide | mitosis |
method by which a cell's cytoplasm divides, creating a new cell | cyotkinesis |
the structures that contain the genetic material that is passed from generation to generation of cells | chromosomes |
the relaxed form of DNA in the cell's nucleus | chromatin |
the stage of mitosis during which a dividing cell spends the most time | prophase |
structures that contain identical copies of DNA | sister chromatids |
the structure at the center of the chromosome where the sister chromatids are attached | centromere |
structure made of spindle fibers, centrioles, and aster fibers that is involved in moving and organizing chromosomes before the cell divides | spindle apparatus |
the second stage of mitosis in which the sister chromatids are pulled by motor proteins along the spindle apparatus toward the center of the cell and line up in the middle, or equator, of the cell | metaphase |
the third stage of mitosis in which the microtubules of the spindle apparatus begin to shorten | anaphase |
the stage of mitosis during which the chromosomes arrive at the poles of the cell and begin to relax, or decondense | telophase |
one of the specific proteins that regulate the cell cycle | cyclins |
enzyme in which cyclin binds during interphase and mitosis, triggering and controlling activities during the cell cycle | cyclin-dependent kinases |
the uncontrolled growth and division of cells | cancer |
substances and agents that are known to cause cancer | carcinogens |
programmed cell death | apotosis |
unspecialized cells that can develop into specialized cells when under the right conditions | stem cells |