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32 Cards in this Set
- Front
- Back
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making new cells allows you to _ and _ cells that have died. |
grow and replace cells |
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_ cells are replaced every few days |
stomach cells |
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- life cycle of a cell |
cell cycle |
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cell cycle begins when _ _ _ _ |
when a cell is made |
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cell cycle ends when _ _ and _ 2 new _ |
when cell divides and forms 2 new cells |
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before a cell divides in must make a copy of its _ |
DNA |
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DNA of a cell is organized into structures called _ |
chromosomes |
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chromosomes in _ cell is 1 of the structures in the nucleus that is made of _ and _ |
eukaryotic, DNA and protein |
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chromosomes in _ cells is the main _ of DNA |
prokaryotic, ring |
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Copying chromosomes will ensure that each new cell will be an exact copy of its _ _ |
parent cell |
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how a cell makes more cells depends on if it is _ or _ |
prokaryotic or eukaryotic |
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which are more complex? prokaryotic ~ eukaryotic |
eukaryotic |
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bacteria have _ and single _ DNA _ but don't have membrane covered organelles |
ribosomes and single circular DNA molecules |
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-cell division in bacteria |
binary fission |
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binary fission- |
splitting into 2 parts |
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binary fission results in _ cells each containing _ copy of the circle of DNA |
2 cells, 1 copy |
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chromosomes of eukaryotic cells have more _ than prokaryotic |
DNA |
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different kinds of eukaryotes have different _ of chromosomes. more complex eukaryotes don't always have more chromosomes than simple ones |
numbers |
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-pairs chromosomes line up in |
homologous chromosomes |
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homologous chromosomes are similar because they have the same sequence of _ and the same _ |
genes and structure |
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eukaryotic cell cycle 3 stages |
interphase, mitosis, cytokinesis |
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in this phase... joined chromatids coil and condense into an X shape |
mitosis |
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in this phase... a cell grows and copies its organelles and chromasomes |
interphase |
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in this stage... the cell splits into 2 identical cells |
cytokinesis |
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interphase- each _ is copied, 2 copies called _, held together at region called _ |
chromosomes, chromatids, centromere |
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mitosis- _ separate, ensures each new cell receives a copy of each _ |
chromatids, chromosomes |
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Mitosis 4 phases |
prophase, metaphase, anaphase, telophase |
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chromatids separate and move to opposite sides of cell |
anaphase |
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nuclear membrane is dissolved and paired chromatids align at equator, begin to attach to spindil fibers |
metaphase |
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nuclear membrane forms around each set of chromosomes and chromosomes unwind |
telophase |
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chromosomes condense from long strands into rodlike structures, spindil fibers and centrols begin forming |
prophase |
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in plant cells _ _ forms new cell membrane and new cell wall that separates to make new cells |
cell plate |
