Test 1 Spring 2002 - Bil 255 Cellular Molecular Biology Dr...

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Bil 255 - Cellular & Molecular Biology Spring 2002 Dr. Charles Mallery FORM 0 Test #1 – 2/21/02 DIRECTIONS: Choose the BEST answer from among the choice given. 01. While Matthais Schleiden and Theodor Schwann are credited with the Cell Theory, the statement “Every cell comes from a cell”, which is truly the foundation of the Cell Theory was made by? a) Rudolf Virchow b) Robert Hooke c) Antonie Leeuwenhoek d) J.D.Watson e) none of these 02. The first laboratory synthesis of a natural biological molecule (urea) which laid the foundation of the science of biochemistry was done in 1828 by? 03. One of the first uses of radioisotopes in cell biology was that of 32 P in proving that DNA is the genetic material. These experiments were done by? 04. The first human cells grown in tissue culture were? 05. The direct exposure of photographic film by beta particles or gamma rays from radioisotopes incorporated into the molecules within cells that have been prepared for microscopy is known as? a) microspectrophotometry b) autoradiography c) nuclear magnetic resonance spectroscopy d) cytometry e) none of these is correct 06. Cells exhibit a continual flux of energy and matter supplied by the environment from which cells extract the factors necessary for self-support and development. Which of the following are mechanisms by which cells can extract energy from their environment? 07. A new theory of evolution and the origin of life on Earth holds that life on Earth was seeded from space, possibly comets, which may have carried bacterial life across galaxies, and is referred to as the theory of? 08. The chemical evolution leading to cellular life on earth almost four billion years ago likely passed through a stage where RNA alone performed all of the functions of the modern macromolecules RNA, DNA and protein. 09. All cells metabolize and therefore most of the metabolic reactions that occur in cells are at equilibrium. a) true b) false
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