Chapter 2

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Chapter 2 CellsSection 1 Cell Structure
Pages 38 40
LESSON 1
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COMMON CELL TRAITS

• A cell is the smallest unit that is capable of
  performing life functions.

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COMPARING CELLS

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

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Prokaryotic Cells(proh KAYR ee yah tihk)

• cells without membrane-bound structures
• EX bacteria
• pond scum

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Eukaryotic Cells(yew KAYR ee yah tihk)

• cells with membrane-bound structures
• EX animals, plants, fungi and protists

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CELL WALL

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

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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.

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CYTOPLASM

• gelatin-like inside cell membrane
• constantly flows
• aka protoplasm

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CYTOSKELETON

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

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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

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NUCLEAR MEMBRANE

• separates nucleus from cytoplasm
• controls movement of materials in out of nucleus

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NUCLEOLUS

• Aka little nucleus
• Found in the nucleus

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CHROMATIN

• contains genetic code that controls cell
• made of DNA proteins

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