Chapter 2 “Cells” Section 1: “Cell Structure Pages 38 – 40 - PowerPoint PPT Presentation

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Chapter 2 “Cells” Section 1: “Cell Structure Pages 38 – 40 PowerPoint Presentation
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Chapter 2 “Cells” Section 1: “Cell Structure Pages 38 – 40

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Chapter 2 “Cells” Section 1: “Cell Structure Pages 38 – 40
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Chapter 2 “Cells” Section 1: “Cell Structure Pages 38 – 40

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  1. Chapter 2 “Cells”Section 1: “Cell Structure Pages 38 – 40 LESSON 1

  2. COMMON CELL TRAITS • A cell is the smallest unit that is capable of performing life functions.

  3. COMPARING CELLS • The size & shape of a cell relates to its function. (job it does)

  4. Prokaryotic Cells(proh KAYR ee yah tihk) • cells without membrane-bound structures • EX: bacteria pond scum

  5. Eukaryotic Cells(yew KAYR ee yah tihk) • cells with membrane-bound structures • EX: animals, plants, fungi and protists

  6. CELL WALL • protects the cell • gives shape • is made of cellulose • A cell wall is found in plants, algae, fungi, & most bacteria.

  7. CELL MEMBRANE • Outer covering, protective layer around ALL cells • For cells with cell walls,the cell membrane is inside the cell wall • Allows food, oxygen, & water into the cell & waste products out of the cell.

  8. CYTOPLASM • gelatin-like inside cell membrane • constantly flows • aka protoplasm

  9. CYTOSKELETON • scaffolding-like structure in cytoplasm • helps the cell maintain or change its shape • made of protein

  10. NUCLEUS • Directs all cell activities • Contains instructions for everything the cell does • These instructions are found on a hereditary material called DNA • Usually the largest organelle

  11. NUCLEAR MEMBRANE • separates nucleus from cytoplasm • controls movement of materials in & out of nucleus

  12. NUCLEOLUS • Aka “little nucleus” • Found in the nucleus

  13. CHROMATIN • contains genetic code that controls cell • made of DNA & proteins