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5 Written questions

5 Matching questions

  1. mitochondrial matrix
  2. stroma
  3. microtubule
  4. chromatin
  5. nucleoid
  1. a The thickest of the three main kinds of fibers making up the cytoskeleton of a eukaryotic cell; a straight, hollow tube made of globular proteins called tubulins. Microtubules form the basis of the structure and movement of cilia and flagella.
  2. b 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.
  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 The fluid contained within the inner membrane of a mitochondrion.
  5. e A dense region of DNA in a prokaryotic cell.

5 Multiple choice questions

  1. 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.
  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. 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.
  4. A microscope that uses an electron beam to study the surface architecture of a cell or other specimen.
  5. 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 True/False questions

  1. cellular metabolismA protective layer external to the plasma membrane in plant cells, bacteria, fungi, and some protists; protects the cell and helps maintain its shape.

          

  2. endosymbiosisA 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.

          

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

          

  4. VesicleA membrane-enclosed sac that is part of the endomembrane system of a eukaryotic cell, having diverse functions.

          

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