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Biology Chapter 4 Test

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5 Written Questions

5 Matching Questions

  1. peroxisome
  2. transmission electron microscope
  3. organelle
  4. endoplasmic reticulum (ER)
  5. plasmodesma
  1. a An open channel in a plant cell wall through which strands of cytoplasm connect from adjacent cells.
  2. b A microscope that uses an electron beam to study the internal structure of thinly sectioned specimens.
  3. c A membrane-enclosed structure with a specialized function within a cell.
  4. d 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. e An organelle containing enzymes that transfer hydrogen from various substrates to oxygen, producing and then degrading hydrogen peroxide.

5 Multiple Choice Questions

  1. The theory that all living things are composed of cells and that all cells come from other cells.
  2. A structure in an animal cell composed of cylinders of microtubule triplets arranged in a 9 and 0 pattern. An animal usually has a centrosome with a pair of centrioles involved in cell division.
  3. A membrane-enclosed sac that is part of the endomembrane system of a eukaryotic cell, having diverse functions.
  4. A substance in which the cells of an animal tissue are embedded; consists of protein and polysaccharides.
  5. An optical instrument with lenses that refract (bend) visible light to magnify images and project them into a viewer's eye or onto photographic film.

5 True/False Questions

  1. endosymbiosisThe complex of DNA and proteins that constitutes eukaryotic chromosomes; often used to refer to the diffuse, very extended form taken by chromosomes when a cell is not dividing.

          

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

          

  3. cytoskeletonEverything inside a cell between the plasma membrane and the nucleus; consists of a semifluid medium and organelles.

          

  4. flagellumA long cellular appendage specialized for locomotion. The flagella of prokaryotes and eukaryotes differ in both structure and function. Like cilia, eukaryotic flagella have a 9 + 2 arrangement of microtubules covered by the cell's plasma membrane.

          

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

          

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