Microbiology - Chapter 8

28 Questions | Total Attempts: 135

SettingsSettingsSettings
Please wait...
Microbiology Quizzes & Trivia

Questions and Answers
  • 1. 
    The synthesis of DNA, in which small nucleotides are joined together to make a single large molecule would be most correctly described as being a/n ________ reaction.
    • A. 

      Metabolic

    • B. 

      Anabolic

    • C. 

      Catabolic

    • D. 

      Cytobolic

  • 2. 
    Photoautotrophs obtain energy from
    • A. 

      Light and use carbon dioxide as a carbon source

    • B. 

      Organic molecules and use carbon dioxide as a carbon source

    • C. 

      Inorganic substances and use carbon dioxide as a carbon source

    • D. 

      Light and use inorganic substances as a carbon source

  • 3. 
    Organisms which get their carbon from other organisms are
    • A. 

      Autotrophs

    • B. 

      Chemotrophs

    • C. 

      Phototrophs

    • D. 

      Heterotrophs

  • 4. 
    Digestive reactions where large molecules are broken down into smaller ones is called:
    • A. 

      Metabolism

    • B. 

      Catabolism

    • C. 

      Biosynthesis

    • D. 

      Anabolism

  • 5. 
    Enzymes work by
    • A. 

      Lowering the energy of the reactants

    • B. 

      Raising the energy of the products

    • C. 

      Decreasing the activation energy of the reaction

    • D. 

      Increasing the activation energy of the reaction

  • 6. 
    Factors that affect the rate of enzyme catalyzed reactions include
    • A. 

      Temperature

    • B. 

      PH

    • C. 

      Concentration of enzyme

    • D. 

      All of the above

  • 7. 
    Which of the following is not a carrier molecule that carries hydrogen atoms or electrons in oxidative
    • A. 

      Iron

    • B. 

      FAD

    • C. 

      Niacin

    • D. 

      NAD

  • 8. 
    In glycolysis each molecule of glucose eventually produces ________ molecules of pyruvic acid.
    • A. 

      One

    • B. 

      Two

    • C. 

      Three

    • D. 

      Four

  • 9. 
    Which of the following is true about glycolysis?
    • A. 

      The net yield of ATP is two ATPs for each molecule of glucose

    • B. 

      It provides cells with a relatively large amount of energy

    • C. 

      Four molecules of ATP are used in the initial phosphorylation steps

    • D. 

      The ATP that is used up during glycolysis is not considered in calculating the net yield of ATP

  • 10. 
    During glycolysis, electrons are initially transferred to
    • A. 

      NAD

    • B. 

      FAD

    • C. 

      NADP

    • D. 

      H2O

  • 11. 
    Organisms that can use oxygen for metabolic reactions but can also function in an environment devoid of oxygen are termed
    • A. 

      Aerobes

    • B. 

      Anaerobes

    • C. 

      Aerophiles

    • D. 

      Facultative anaerobes

  • 12. 
    Aerotolerant anaerobes
    • A. 

      Can only utilize oxygen and can detoxify it

    • B. 

      Require a small amount of oxygen to survive and grow

    • C. 

      Can't survive in presence of oxgen

    • D. 

      Do not utilize oxygen but can survive ad grow in its presence

  • 13. 
    In fermentation reactions occuring in yeast to produce wine, two products of the reactions are _______ and ____________.
    • A. 

      Acid; hydrogen gas

    • B. 

      Hydrogen gas; propionic acid

    • C. 

      Ethyl alcohol; methane

    • D. 

      Carbon dioxide; ethyl alcohol

  • 14. 
    The initial substrate molecule for the Krebs cycle is
    • A. 

      Pyruvic acid

    • B. 

      Acetyl-CoA

    • C. 

      Acetic acid

    • D. 

      Butanediol

  • 15. 
    In aerobic respiration, the final electron acceptor is
    • A. 

      Water

    • B. 

      Oxygen

    • C. 

      Sulfur

    • D. 

      Coenzyme Q

  • 16. 
    The prokaryotic aerobic metabolism of glucose produces a total (net) of ________ molecules of ATP.
    • A. 

      24

    • B. 

      30

    • C. 

      34

    • D. 

      38

  • 17. 
    Which reaction takes place in the mitochondrial matrix?
    • A. 

      Glycolysis

    • B. 

      Fermentation

    • C. 

      Krebs cycle

    • D. 

      Electron transport

  • 18. 
    The first step in protein metabolism is the breakdown of proteins into
    • A. 

      Nucleotides

    • B. 

      Fatty acids

    • C. 

      Amino acids

    • D. 

      Coenzymes

  • 19. 
    The green sulfur and purple sulfur bacteria are capable of
    • A. 

      Carrying out photosynthesis

    • B. 

      Only obtaining energy from organic molecules

    • C. 

      Bypassing glycolysis for the Krebs cycle

    • D. 

      Metabolizing without enzymes

  • 20. 
    In photosynthesis, light energy is used to
    • A. 

      Break down proteins

    • B. 

      Phosphorylate ADP to form ATP

    • C. 

      Metabolize glycerol

    • D. 

      Synthesize carbohydrates

  • 21. 
    In photosynthesis, chemical energy is used to make organic molecules in the
    • A. 

      Light reaction

    • B. 

      Dark reaction

    • C. 

      Hydrolytic reaction

    • D. 

      Photophosphorylation reaction

  • 22. 
    Bioluminescent microbes
    • A. 

      May have evolved to remove oxygen from the atmosphere

    • B. 

      Are often beneficiares of symbiotic relationships with a larger host, producing light in exchange for nutrients

    • C. 

      Often have the enzyme luciferase which catalyzes the oxidation reaction that emits light

    • D. 

      All of the above

  • 23. 
    Glucose is to photosynthesis as pyruvate is to 
    • A. 

      Oxidative phosphorylation

    • B. 

      Glycolysis

    • C. 

      Fermentation

    • D. 

      Krebs cycle

  • 24. 
    Which one of the following pairs is mismatched
    • A. 

      Alcohol-fermentation

    • B. 

      Pyruvate-glycolysis

    • C. 

      Carbon dioxide-glycolysis

    • D. 

      NADH-Krebs cycle

  • 25. 
    A holoenzyme consists of
    • A. 

      An apoenzyme plus a cofactor

    • B. 

      An apoenzyme plus a coenzyme

    • C. 

      A protein and non-protein component

    • D. 

      All of the above