Ch 2 Micro

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XQWCat
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173779
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Ch 2 Micro
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2012-09-27 00:06:34
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Microbiology
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Ch 2 Lecture microbiology
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  1. Which of the following statements about the atom 126C is false?
    A) It has 6 protons in its nucleus.
    B) It has 12 neutrons in its nucleus.
    C) It has 6 electrons orbiting the nucleus.
    D) Its atomic number is 6.
    E) Its atomic weight is 12.
    B
  2. 168O 126C 11H
    calculate the molecular weight of ethanol, C2H5OH.
    A) 96
    B) 46
    C) 34
    D) 33
    E) Can't tell
    B
  3. Antacids neutralize acid by the following reaction. Identify the salt. Mg(OH)2 + 2HCl →
    MgCl2 + H2O
    A) Mg(OH)2
    B) HCl
    C) MgCl2
    D) H2O
    E) None of the above
    C
  4. Which of the following statements is false?
    A) Salts readily dissolve in water.
    B) Water molecules are formed by hydrolysis.
    C) Water freezes from the top down.
    D) Water is a part of a dehydration reaction.
    E) Water is a polar molecule.
    B
  5. Which of the following is the type of bond holding K+ and I- ions in KI?
    A) Ionic bond
    B) Covalent bond
    C) Hydrogen bond
    A
  6. Which of the following is the type of bond between molecules of water in a beaker of water?
    A) Ionic bond
    B) Covalent bond
    C) Hydrogen bond
    C
  7. What is the type of bond holding hydrogen and oxygen atoms in the H2O molecule?
    A) Ionic bond
    B) Covalent bond
    C) Hydrogen bond
    B
  8. Identify the following reaction: Glucose + Fructose → Sucrose + Water
    A) Dehydration synthesis reaction
    B) Hydrolysis reaction
    C) Exchange reaction
    D) Reversible reaction
    E) Ionic reaction
    A
  9. Identify the following reaction: Lactose + H2O → Glucose + Galactose
    A) Dehydration synthesis reaction
    B) Hydrolysis reaction
    C) Exchange reaction
    D) Reversible reaction
    E) Ionic reaction
    B
  10. Identify the following reaction: HCl + NaHCO3 → NaCl + H2CO3
    A) Dehydration synthesis reaction
    B) Hydrolysis reaction
    C) Exchange reaction
    D) Reversible reaction
    E) Ionic reaction
    C
  11. Identify the following reaction: NH4OH ⇌ NH3 + H2O
    A) Dehydration synthesis reaction
    B) Hydrolysis reaction
    C) Exchange reaction
    D) Reversible reaction
    E) Ionic reaction
    D
  12. Which type of molecule contains the alcohol glycerol?
    A) Carbohydrate
    B) Lipid
    C) Nucleic acid
    D) Protein
    B
  13. Which type of molecule is composed of (CH2O) units?
    A) Carbohydrate
    B) Lipid
    C) Nucleic acid
    D) Protein
    A
  14. Which type of molecule contains -NH2 groups?
    A) Carbohydrate
    B) Lipid
    C) Nucleic acid
    D) Protein
    D
  15. Which type of molecule NEVER contains a phosphate group?
    A) Carbohydrate
    B) Lipid
    C) Nucleic acid
    D) Protein
    A
  16. Which of the following statements about the atom 168O is false?
    A) It has 8 protons in its nucleus.
    B) It has 8 electrons in its nucleus.
    C) It has 8 neutrons in its nucleus.
    D) Its atomic number is 8.
    E) Its atomic weight is 16.
    B
  17. Using the information in Table 2.2, calculate the number of moles in 92 grams of ethanol, C2H5OH.
    A) 1
    B) 2
    C) 3
    D) 4
    E) Can't tell
    B
  18. The following chemical reaction is used to remove chlorine from water. What type of
    reaction is it?
    HClO + Na2SO3 → Na2SO4 + HCl
    A) Dehydration synthesis reaction
    B) Hydrolysis synthesis reaction
    C) Exchange synthesis reaction
    D) Reversible synthesis reaction
    E) Ionic synthesis reaction
    C
  19. Which of the following pairs is mismatched?
    A) NaOH ⇌ Na+ + OH- – base
    B) HF ⇌ H+ + F- – acid
    C) MgSO4 ⇌ Mg2+ + SO42- – salt
    D) KH2PO4 ⇌ K+ + H2PO4- – acid
    E) H2SO4 ⇌ 2H+ + SO42- – acid
    D
  20. What is the type of bond between the hydrogen of one molecule and the nitrogen of another
    molecule?
    A) Ionic bond
    B) Covalent bond
    C) Hydrogen bond
    D) Disulfide bond
    E) Hydrophobic bond
    C
  21. What is the type of bond between carbon, hydrogen, and oxygen atoms in organic
    molecules?
    A) Ionic bond
    B) Covalent bond
    C) Hydrogen bond
    B
  22. What is the type of bond between ions in salt?
    A) Ionic bond
    B) Covalent bond
    C) Hydrogen bond
    A
  23. Identify the following reaction: H2O + CO2 ⇌ H2CO3
    A) Dehydration synthesis reaction
    B) Hydrolysis reaction
    C) Exchange reaction
    D) Reversible reaction
    E) Covalent reaction
    C
  24. Identify the following reaction: Glycine + Lysine → Dipeptide + H2O
    A) Dehydration synthesis reaction
    B) Hydrolysis reaction
    C) Exchange reaction
    D) Reversible reaction
    E) Covalent reaction
    E
  25. Identify the following reaction: Sucrose + H2O → Glucose + Fructose
    A) Dehydration synthesis reaction
    B) Hydrolysis reaction
    C) Exchange reaction
    D) Reversible reaction
    E) Covalent reaction
    B
  26. Structurally, ATP is most like which type of molecule?
    A) Carbohydrate
    B) Lipid
    C) Protein
    D) Nucleic acid
    D
  27. What do genes consist of?
    A) Carbohydrates
    B) Lipids
    C) Proteins
    D) Nucleic acids
    D
  28. Which molecule is composed of a chain of amino acids?
    A) Carbohydrate
    B) Lipid
    C) Protein
    D) Nucleic acid
    C
  29. Which are the primary molecules making up plasma membranes in cells?
    A) Carbohydrates
    B) Lipids
    C) Proteins
    D) Nucleic acids
    B
  30. The antimicrobial drug imidazole inhibits sterol synthesis. This would most likely interfere
    with
    A) Bacterial cell walls.
    B) Fungal cell walls.
    C) Eukaryotic plasma membranes.
    D) Prokaryotic plasma membranes.
    E) Genes.
    C
  31. C---N

    What kind of bond is at the arrow in Figure 2.1?
    A) Disulfide bridge
    B) Double covalent bond
    C) Hydrogen bond
    D) Ionic bond
    E) Peptide bond
    E
  32. An E. coli culture that has been growing at 37°C is moved to 25°C. Which of the following
    changes must be made in its plasma membrane?
    A) The number of phosphate groups must increase.
    B) The viscosity must increase.
    C) The number of saturated chains must increase.
    D) The number of unsaturated chains must increase.
    E) No changes are necessary.
    D
  33. Assume Saccharomyces cerevisiae is grown in a nutrient medium containing the
    radioisotope 35S. After a 48-hour incubation, the 35S would most likely be found in the S.
    cerevisiae's
    A) Carbohydrates.
    B) Nucleic acids.
    C) Water.
    D) Lipids.
    E) Proteins.
    E
  34. Assume Saccharomyces cerevisiae is grown in a nutrient medium containing the
    radioisotope 32P. After a 48-hour incubation, the 32P would most likely be found in the S.
    cerevisiae's
    A) Plasma membrane.
    B) Cell wall.
    C) Water.
    D) Proteins.
    E) Carbohydrates.
    A
  35. Starch, dextran, glycogen, and cellulose are polymers of
    A) Amino acids.
    B) Glucose.
    C) Fatty acids.
    D) Nucleic acids.
    E) Acids.
    B
  36. Which of the following is a base?
    A) C2H5OCOOH → H+ + C2H5OCO
    B) C2H5OH
    C) NaOH → Na+ + OHD)
    H2O → H+ + OHE)
    H2CO
    C
  37. Two glucose molecules are combined to make a maltose molecule. What is the chemical
    formula for maltose?
    A) C3H6O3
    B) C6H12O6
    C) C12H24O12
    D) C12H22O11
    E) C12H23O10
    D
  38. Desulfovibrio bacteria can perform the following reaction: S6- → S2-. These bacteria are
    A) Synthesizing sulfur.
    B) Reducing sulfur.
    C) Hydrolyzing sulfur.
    D) Oxidizing sulfur.
    D
  39. Oil-degrading bacteria are naturally present in the environment but cannot degrade an oil
    spill fast enough to avoid ecological damage. How can the actions of these bacteria be sped up?
    A) Provide oil for them.
    B) Provide sugar as a carbon source.
    C) Provide nitrogen and phosphorus.
    D) Add water.
    E) Add NaCl.
    C

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