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Ch 7-1 & 7-2: Life is Cellular

Ch 7-1 & 7-2: Life is Cellular. Notes #8. What is the Cell Theory?. Cells are the basic unit of life. All cells come from pre-existing cells. 3. All organisms are made of cells. Common Cell Structures. 1. Cell Membrane. 2. Nucleus. 3. Cytoplasm. Common Cell Structures.

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Ch 7-1 & 7-2: Life is Cellular

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  1. Ch 7-1 & 7-2: Life is Cellular Notes #8

  2. What is the Cell Theory? • Cells are the basic unit of life. • All cells come from pre-existing cells. 3. All organisms are made of cells.

  3. Common Cell Structures 1. Cell Membrane 2. Nucleus 3. Cytoplasm

  4. Common Cell Structures • Cell Membrane: Thin flexible barrier that surrounds a cell. • Nucleus: Present in some cells that contains DNA and controls cell activity. • Cytoplasm: Gel-like material within the cell, that keeps cell parts in place

  5. General Cell Types • 2 Types • Prokaryotes: Organisms that… -are single celled -do NOT contain membrane- bound cell parts -do NOT have a nucleus Ex. Bacteria

  6. 2) Eukaryotes: Organisms that -have a nucleus -have membrane-bound cell parts Ex. Plant and Animal Cells Onion Cell Human Cheek Cells

  7. Prokaryotic vs Eukaryotic Cells Prokaryotic Cell DNA Cell Wall Flagellum Ribosome Cell Membrane

  8. Eukaryotic Cell

  9. Prokaryotic Cell Eukaryotic Cell

  10. What makes eukaryotic cells special? • Unlike prokaryotic cells, all eukaryotic cells have a membrane-bound nucleus, and specialized internal cell structures called organelles.

  11. Common Structures in All Eukaryotic Cells • Nucleus: Contains DNA and controls the cell’s activities -Chromatin: Tightly coiled strands of DNA & protein found within the nucleus. • Nucleolus: Dense small region found within the nucleus that makes ribosomes • Nuclear Envelope: Controls what materials go in and out of the nucleus.

  12. Nucleus

  13. Ribosomes (Free) • Makes protein for the cell to use

  14. Endoplasmic Reticulum (ER) • Internal transport system of the cell • Rough ER: has ribosomes attached & makes proteins to be exported out of cell. • Smooth ER: no ribosome attachment & makes lipids

  15. Endoplasmic Reticulum

  16. Golgi Apparatus • Pancake-like stacks that modifies and packages proteins to be exported out of cell.

  17. Mitochondria • Makes cell energy (ATP) from food (glucose) through cell respiration.

  18. Cytoskeleton • Helps support the cell and gives it shape Cytoskeleton

  19. Found in Animal Cells Only • Centrioles: Help cells reproduce Centrioles

  20. Found in Animal Cells Only • Lysosomes: Breaks down food, wastes, and used organelles with digestive enzymes Digestive Enzymes

  21. Found in Plant Cells Only • Cell Wall: Surrounds and protects the cell membrane. Cell Membrane Cell Wall

  22. Found in Plants Only • Chloroplasts: Converts sunlight energy into glucose by photosynthesis. • Central Vacuole: Stores water, food, and waste for the plant cell

  23. Two types of eukaryotic cells we have studied include animal & plant cell Animal Cell Plant Cell

  24. Classwork 1) Workbook Section 7-1 & 7-2 (1-34) • ANSWERS ONLY (Stamped) 2) Section Assessment Write out QUESTIONS & ANSWERS (7-1); #1-5 p. 172 (7-2); #1-6 p 183

  25. Double Bubble Thinking Map Copy the following words on your paper Then complete the Double Bubble Thinking Map • Cell Membrane • Prokaryotic Cells • Cytoplasm • Contains membrane bound-Organelles • Eukaryotic Cells • Contains a Nucleus • Contains DNA • Ex. Bacteria • Ex. Plant & Animal Cell

  26. Double Bubble Thinking Map Yellow Bubbles: Things in Common; Grey: Unique to Cell

  27. Double Bubble Thinking Map Yellow Bubbles: Things in Common; Grey: Unique to Cell Eukaroytic Cells Prokaroytic Cells

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