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5 Written questions

5 Matching questions

  1. Vacuole
  2. plasmodesma
  3. mitochondrial matrix
  4. cell wall
  5. eukaryotic cell
  1. a A protective layer external to the plasma membrane in plant cells, bacteria, fungi, and some protists; protects the cell and helps maintain its shape.
  2. b The fluid contained within the inner membrane of a mitochondrion.
  3. c An open channel in a plant cell wall through which strands of cytoplasm connect from adjacent cells.
  4. d A type of cell that has a membrane-enclosed nucleus and other membrane-enclosed organelles. All organisms except bacteria and archaea are composed of eukaryotic cells.
  5. e A membrane-enclosed sac that is part of the endomembrane system of a eukaryotic cell, having diverse functions.

5 Multiple choice questions

  1. A macromolecule consisting of one or more polypeptides linked to short chains of sugars.
  2. An instrument that focuses an electron beam through, or onto the surface of, a specimen. An electron microscope achieves a hundredfold greater resolution than a light microscope.
  3. An infolding of the inner membrane of a mitochondrion in which is embedded the electron transport chain and the enzyme catalyzing the synthesis of ATP.
  4. An extensive membranous network in a eukaryotic cell, continuous with the outer nuclear membrane and composed of ribosome-studded (rough) and ribosome-free (smooth) regions.
  5. An intermediate-sized protein fiber that is one of the three main kinds of fibers making up the cytoskeleton of eukaryotic cells. Intermediate filaments are ropelike, made of fibrous proteins.

5 True/False questions

  1. scanning electron microscope (SEM)A microscope that uses an electron beam to study the surface architecture of a cell or other specimen.


  2. chromosomeAn organelle containing enzymes that transfer hydrogen from various substrates to oxygen, producing and then degrading hydrogen peroxide.


  3. rough ER(1) An atom's central core, containing protons and neutrons. (2) The genetic control center of a eukaryotic cell.


  4. plasma membraneThe membrane that sets a cell off from its surroundings and acts as a selective barrier to the passage of ions and molecules into and out of the cell; consists of a phospholipid bilayer in which are embedded molecules of protein and cholesterol.


  5. endomembrane systemA network of membranes inside and around a eukaryotic cell, related either through direct physical contact or by the transfer of membranous vesicles.


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