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Chapter 2 – Cell structure & the cell cycle

Chapter 2 – Cell structure & the cell cycle. Plant Cells. What distinguishes plant cells?. Plastids (chloroplasts, etc.) Cell wall Large central vacuole Plant cell specific connections. Where are the chloroplasts?. Plastids Chloroplasts Leucoplasts Amylopasts Elaioplasts (niyb).

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Chapter 2 – Cell structure & the cell cycle

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  1. Chapter 2 – Cell structure & the cell cycle

  2. Plant Cells

  3. What distinguishes plant cells? • Plastids (chloroplasts, etc.) • Cell wall • Large central vacuole • Plant cell specific connections

  4. Where are the chloroplasts? • Plastids • Chloroplasts • Leucoplasts • Amylopasts • Elaioplasts (niyb)

  5. Plastids - Chromoplasts

  6. Chloroplasts, mitochondria and endosymbiosis

  7. Chloroplast Genome • Circular DNA molecule • Replicate independently • Sequence characteristics resembles that of bacteria

  8. Paramecium with endosymbiont Chlorella

  9. Plant cell walls • Primary cell walls • Secondary cell walls -for structural support

  10. Cell walls • Pectins (proteins) and hemicelluloses (carbohydrates) link cellulose molecules together

  11. Cell Walls • Lignin strengthens & waterproofs secondary cell walls

  12. Plant cell connections • Middle lamella (pectins) hold cells together • Bordered pits speed water and solute diffusion through cells with secondary cell walls

  13. Bordered pits

  14. Plant cell connections • Plasmodesmata provide cytoplasmic connections between cells

  15. Plasmodesmata

  16. Cytoskeleton • Microtubules • Microfilaments • Motor proteins (walking molecules)

  17. Movement in plant cells and the cytoskeleton

  18. Plant cell research • Plasmodesmata

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