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Science
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| Number of pages / Number of words: |
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Essay's paper body
cell division
? continuity of life, reproduction of cells
? reproduction
? unicellular organism
? growth
? repair and renew
cell cycle
? life of a cell from origin to division into 2 new daughter cells
mitosis – cell division in somatic cells
somatic cell – all cells in the body besides sex cells
gamete cell – sex cells
? meiosis
exact copy of genetic material, DNA, is passed to daughter cells
? division step – mitosis
cytokinesis – splitting the cytoplasm
dividing cells duplicates DNA
? separates each copy to opposite ends of cell
? splits into 2 daughter cells
? - separates 2 copies so each daughter cell has completely identical copy
? error rate – 1 per 100 million bases
? - 3 million base pairs
? - mammalism genome
? - 30 errors per cell cycle
? - mutation
DNA is organized in chromosomes
? double helix DNA molecule
? associated proteins, histone proteins
? DNA – protein complex – chromatin
? - organized into long thin fiber
centomere – where sister chromatids are held together
after DNA duplication, chromatin condenses
? coiling and folding to make a smaller packages
? - from DNA to chromatin to highly condensed miotic chromosomes
Duplicated chromosome consists of 2 sister chromatids
cell cycle – cell has a life cycle
? cell is formed fro ma mitotic divisions
Interphase
? 90% of cell life cycle
? produce RNA, synthesize proteins
? prepare for duplication if triggered
Characteristic
? nucleus well define
? DNA loosely packed in long chromatin fibers
G1 – normal growth
S- makes DNA
G2 – makes more organelle, prepare for cell division
Mitosis – copying cell's DNA and dividing it between 2 daughter nuclei
mitosis is divided into 4 phases
? prophase
? metapahse
? anaphase
? telophase
Prophase
1...
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cell division
? continuity of life, reproduction of cells
? reproduction
? unicellular organism
? growth
? repair and renew
cell cycle
? life of a cell from origin to division into 2 new daughter cells
mitosis – cell division in somatic cells
somatic cell – all cells in the body besides sex cells
gamete cell – sex cells
? meiosis
exact copy of genetic material, DNA, is passed to daughter cells
? division step – mitosis
cytokinesis – splitting the cytoplasm
dividing cells duplicates DNA
? separates each copy to opposite ends of cell
? splits into 2 daughter cells
? - separates 2 copies so each daughter cell has completely identical copy
? error rate – 1 per 100 million bases
? - 3 million base pairs
? - mammalism genome
? - 30 errors per cell cycle
? - mutation
DNA is organized in chromosomes
? double helix DNA molecule
? associated proteins, histone proteins
? DNA – protein complex – chromatin
? - organized into long thin fiber
centomere – where sister chromatids are held together
after DNA duplication, chromatin condenses
? coiling and folding to make a smaller packages
? - from DNA to chromatin to highly condensed miotic chromosomes
Duplicated chromosome consists of 2 sister chromatids
cell cycle – cell has a life cycle
? cell is formed fro ma mitotic divisions
Interphase
? 90% of cell life cycle
? produce RNA, synthesize proteins
? prepare for duplication if triggered
Characteristic
? nucleus well define
? DNA loosely packed in long chromatin fibers
G1 – normal growth
S- makes DNA
G2 – makes more organelle, prepare for cell division
Mitosis – copying cell's DNA and dividing it between 2 daughter nuclei
mitosis is divided into 4 phases
? prophase
? metapahse
? anaphase
? telophase
Prophase
1...
Essay fragment
General points of the essay
Cell Division: Mitosis And Meiosis
Cells And Cell Theory
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Stem Cell Technology:The Controversies surrounding Stem Cell Research
Cell Reproduction
the Cell Phone on the American Way of Life
Th cell as the basic unit of life
How a Cell Phone Changed My Life
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What Makes You Buy a Cell Phone
The nucleus Brain of the cell
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The Cell
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