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5 Written Questions

5 Matching Questions

  1. nucleoid
  2. rough ER
  3. endosymbiosis
  4. crista
  5. transmission electron microscope
  1. a A dense region of DNA in a prokaryotic cell.
  2. b 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.
  3. c A process by which the mitochondria and chloroplasts of eukaryotic cells probably evolved from symbiotic associations between small prokaryotic cells living inside larger cells.
  4. d A network of interconnected membranous sacs in a eukaryotic cell's cytoplasm. Rough ER membranes are studded with ribosomes that make membrane proteins and secretory proteins.
  5. e A microscope that uses an electron beam to study the internal structure of thinly sectioned specimens.

5 Multiple Choice Questions

  1. The fluid of the chloroplast surrounding the thylakoid membrane; involved in the synthesis of organic molecules from carbon dioxide and water; Sugars are made in the stroma by the enzymes of the Calvin cycle.
  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. A threadlike, gene-carrying structure found in the nucleus of a eukaryotic cell and most visible during mitosis and meiosis; also, the main gene-carrying structure of a prokaryotic cell. Chromosomes consist of chromatin, a combination of DNA and protein.
  4. The thinnest of the three main kinds of protein fibers making up the cytoskeleton of a eukaryotic cell; a solid, helical rod composed of the globular protein actin.
  5. The chemical activities of cells.

5 True/False Questions

  1. nuclear envelopeA double membrane, perforated with pores, which encloses the nucleus and separates it from the rest of the eukaryotic cell.

          

  2. cell wallThe theory that all living things are composed of cells and that all cells come from other cells.

          

  3. microtubuleA photograph taken through a microscope.

          

  4. chromatinA threadlike, gene-carrying structure found in the nucleus of a eukaryotic cell and most visible during mitosis and meiosis; also, the main gene-carrying structure of a prokaryotic cell. Chromosomes consist of chromatin, a combination of DNA and protein.

          

  5. Reverse TranscriptaseA 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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