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5 Written questions

5 Matching questions

  1. electron microscope (EM)
  2. mitochondrion
  3. cytoskeleton
  4. chromatin
  5. chloroplast
  1. a An organelle found in plants and photosynthetic protists that absorbs sunlight and uses it to drive the synthesis of organic molecules (sugars) from carbon dioxide and water.
  2. b 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. c The 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.
  4. d A network of protein fibers in the cytoplasm of a eukaryotic cell; includes microfilaments, intermediate filaments, and microtubules.
  5. e An organelle in eukaryotic cells where cellular respiration occurs. Enclosed by two concentric membranes, it is where most of the cell's ATP is made.

5 Multiple choice questions

  1. A structure within the nucleus of a eukaryotic cell where ribosomal RNA is made and assembled with proteins imported from the cytoplasm to make ribosomal subunits.
  2. A protective layer external to the plasma membrane in plant cells, bacteria, fungi, and some protists; protects the cell and helps maintain its shape.
  3. The fluid contained within the inner membrane of a mitochondrion.
  4. A digestive organelle in eukaryotic cells; contains hydrolytic enzymes that digest the cell's food and wastes.
  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. transmission electron microscopeA microscope that uses an electron beam to study the surface architecture of a cell or other specimen.


  2. VacuoleA sac made of membrane in the cytoplasm of a eukaryotic cell.


  3. ribosomeA digestive organelle in eukaryotic cells; contains hydrolytic enzymes that digest the cell's food and wastes.


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


  5. endosymbiosisOne of a number of disk-shaped membranous sacs inside a chloroplast. Thylakoid membranes contain chlorophyll and the enzymes of the light reactions of photosynthesis. A stack of thylakoids is called a granum.


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