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Cell Reproduction: Importance and Processes

Learn why cells reproduce for growth, repair, and maintenance. Understand chromosomes, DNA, and the cell cycle in this informative guide. Explore interphase, mitosis, and cytokinesis in eukaryotic cell division.

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Cell Reproduction: Importance and Processes

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  1. CH8 Cell Reproduction

  2. Why Cells Reproduce • Growth of the organism • Replace old or damaged cells • Maintain cell size • Reduce size of cell as it grows • Surface area – to – volume ratio

  3. Chromosomes • Made up of organized and packaged DNA • Deoxyribonucleic Acid • 2m of DNA in one cell (almost 2000 miles of DNA) • genes are segments of DNA (code RNA & Proteins)

  4. In Text Pg 151

  5. A Comparison

  6. Preparing for Cell Division • DNA must be copied, sorted, separated • Organelles, in eukaryotes, must be duplicated • Prokaryotes go through binary fission

  7. Eukaryotic Cell Division • Cell Cycle • Repeating sequence of events that occur during the life cycle of a cell • Growth • DNA replication • Division of the nucleus and cytoplasm

  8. Cell Cycle • Interphase consist of the 1st three • G1 (Cell growth) • organelles made • S (Synthesis) • DNA duplicated • G2 (Growth and preparation) • Microtubules form • Mitosis (Nucleus Divides) • Cytokinesis (Cytoplasm Divides)

  9. Interphase • Time in this phase varies • Controlled by signals from proteins and environment • G1 and G2 check points • Determine if cell healthy for division • Checks for mistakes in DNA copies

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