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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
the Cell Phone on the American Way of Life
cell
Cell Reproduction
Stem Cell Technology:The Controversies surrounding Stem Cell Research
What Makes You Buy a Cell Phone
Cell Division: Mitosis And Meiosis
Cell-Penetrating Peptide Conjugates Of Peptide Nucleic Acids (Pna) As Inhibitors Of Hiv-1 Tat-Dependent Trans-Activation In Cells
Cells And Cell Theory
cell division
cell rap
Th cell as the basic unit of life
The Cell
The nucleus Brain of the cell
Cell Phone Effects On Life
How a Cell Phone Changed My Life
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