7-2 Eukaryotic Cell Structure - District Notes.ppt.pdf¢  9/19/11 1 7-2 Eukaryotic Cell...

7-2 Eukaryotic Cell Structure - District Notes.ppt.pdf¢  9/19/11 1 7-2 Eukaryotic Cell Structure I
7-2 Eukaryotic Cell Structure - District Notes.ppt.pdf¢  9/19/11 1 7-2 Eukaryotic Cell Structure I
7-2 Eukaryotic Cell Structure - District Notes.ppt.pdf¢  9/19/11 1 7-2 Eukaryotic Cell Structure I
7-2 Eukaryotic Cell Structure - District Notes.ppt.pdf¢  9/19/11 1 7-2 Eukaryotic Cell Structure I
7-2 Eukaryotic Cell Structure - District Notes.ppt.pdf¢  9/19/11 1 7-2 Eukaryotic Cell Structure I
download 7-2 Eukaryotic Cell Structure - District Notes.ppt.pdf¢  9/19/11 1 7-2 Eukaryotic Cell Structure I

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Transcript of 7-2 Eukaryotic Cell Structure - District Notes.ppt.pdf¢  9/19/11 1 7-2 Eukaryotic Cell...

  • 9/19/11

    1

    7-2 Eukaryotic Cell Structure

    I. Parts of the Cell

    A. Nucleus -control center of the cell -contains DNA -Parts of the nucleus Chromatin-granular material

    visible inside the nucleus, forms chromosomes during cell division

    Nucleolus - inside nucleus, makes ribosomes

    Nuclear envelope - surrounds nucleus, contains nuclear pores

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    B. Ribosomes -assemble

    proteins -located on the

    endoplasmic reticulum and also floating in cytoplasm

    Ribosomes

    C.  Endoplasmic Reticulum (ER) 1. Rough ER - modify proteins, assemble cell membrane parts, move proteins to golgi apparatus 2. Smooth ER - no ribosomes, detoxification & synthesis of membrane lipids

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    D. Golgi Apparatus - modify, sort & package proteins

    from the ER - ships proteins where they are

    needed in the cell

    E. Lysosomes - break down lipids, carbs, &

    proteins - digest old cell parts - “garbage disposals”

    F. Vacuoles - used for storage of water, salt, & proteins

    Vacuole

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    G.  Choloroplasts - plants only -contain chlorophyll -capture sun-light to carry out photosynthesis -have their own DNA

    Chloroplast

    Chloroplast

    H.  Mitochondria - use food energy to make compounds for growth, development & movement - have their own DNA - “powerhouse” of the cell

    Mitochondrion

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    II. Support - Cytoskeleton

    !  Maintain cell shape & aid in movement !  Made of 2 kinds of protein

    –  Microtubules !  Hollow tubes of protein !  Separate chromosomes during cell division !  Make up cilia & flagella

    –  Microfilaments !  Long, thin fibers !  Form a flexible network to move organelles around

    Cytoskeleton !  Cytoskeleton

    Ribosomes Mitochondrion

    Endoplasmic reticulum

    Cell membrane

    Microtubule

    Microfilament