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Cells Test

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5 Written Questions

5 Matching Questions

  1. cell movement
  2. the cytoskeleton
  3. Eukaryotes
  4. vacuoles
  5. mitochondria
  1. a -found in almost all eukaryotes
    -powerhouses of cell
    -extract energy from organic molecules through oxidative metabolism
    -sausage shaped organelles, about the size of a bacterial cell
    -like bacteria, they possess circular DNA and divide by simple fission
  2. b -Appeared about 1.5 billion years ago
    -Include all cells alive today except bacteria and archaea
    -Are larger than proaryotic cells
    -Have a more complex archetecture
    -Possess a nucleus and a variety of organelles
  3. c -in plants-store dissolved substances and can increase the cells surface area
    -in protists-contractile vacuoles are used to pump excess water
  4. d -a dense network of protein fibers that supports the shape of the cell and anchors organelles
    -3 different kinds of protein fibers: microfilaments, microtubules, and intermediate filaments
  5. e -all cell motion is tied to movement of microfilaments and microtubules
    -changes in shape of microfilaments: enables some cells to change shape quickly, allow some cells to crawl and animal cells to divide

5 Multiple Choice Questions

  1. -All organisms are composed of one or more cells
    -Cells are the smallest living things
    -Cells arise only by division of a preiviously existing cell
  2. -Is associated with proteins
    -During cell division, condenses into chromosomes
    -After cell division, relaxes into chromatin
  3. -arise from the golgi complex
    -contain enzymes that break down macromolecules
    -function in intracellular digestion of worn out cellular components and substances taken into cells
    -resulting material is recycled
  4. motor protein that moves vesicles to the cells periphery
  5. -proposes that mitochondria and chloroplasts arose by symbiosis from ancient bacteria
    -this theory is supported by a wealth of evidence

5 True/False Questions

  1. chloroplasts-anchor and assmble microtubules
    -not found in plants or fungi
    -may have originated as symbiotic bacteria

          

  2. Cell Size-offer protection and support
    -fungal cell walls are made of chitin
    -plant cell walls are made of cellulose

          

  3. The Endomembrane System-Extensive system of interior membranes that divides cell into compartments

          

  4. Endoplasmic Recticulum-Encases all living things
    -Its basic structure is represented by the fluid-mosaic model
    -Phospholipid bilayer with embedded proteins
    -In water, phospholipids spontaneously form a bilayer
    - Cell membranes contain zones called lipid rafts which are heavily enriched in cholesterol

          

  5. cillashort and numerous

          

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