Chapter 2 Self Quiz: Chemistry

  1. Which particle has a negative charge and orbits the nucleus of an atom?
    1. proton (wrong)
    2. neutron (wrong)
    3. electron (correct)
    4. positron (wrong)
    5. ion (wrong)
      Hint
  2. Carbon plays a central role in many biological reactions because
    1. it has more electrons than protons (wrong)
    2. it has more protons than electrons (wrong)
    3. it has many vacancies in its outermost shell (correct)
    4. it has a complete outermost shell (wrong)
    5. it has more neutrons than protons (wrong)
      Hint
  3. What is the atomic number of the negatively charged ion formed shown in the diagram?
    1. 1 (wrong)
    2. 10 (wrong)
    3. 11 (wrong)
    4. 16 (wrong)
    5. 17 (correct)
      Hint
  4. Sodium chloride (NaCl) is composed of alternating sodium and chloride ions held together by ________ bonds.
    1. hydrogen (wrong)
    2. covalent (wrong)
    3. ionic (correct)
    4. cohesive (wrong)
    5. adhesive (wrong)
      Hint
  5. A covalent bond is the sharing of ________ electron(s).
    1. one (wrong)
    2. two (correct)
    3. three (wrong)
    4. four (wrong)
    5. eight (wrong)
      Hint
  6. A water molecule has
    1. two polar covalent bonds (correct)
    2. two ionic bonds (wrong)
    3. two hydrogen bonds (wrong)
    4. one double covalent bond (wrong)
    5. one single covalent bond (wrong)
      Hint
  7. The dotted lines in this diagram are weak ________ bonds due to attraction of partially charged regions between water molecules.
    1. covalent (wrong)
    2. hydrogen (correct)
    3. oxygen (wrong)
    4. ionic (wrong)
    5. polish (wrong)
      Hint
  8. The property of water that is responsible for surface tension is called
    1. hydrophilic (wrong)
    2. hydrophobic (wrong)
    3. hydration (wrong)
    4. dehydration (wrong)
    5. cohesion (correct)
      Hint
  9. The concentration of hydrogen ions in a solution is a measure of its
    1. electronegativity (wrong)
    2. salinity (wrong)
    3. polarity (wrong)
    4. pH (correct)
    5. atomic number (wrong)
      Hint
  10. Which kind of macromolecule is made of C, H, and O (carbon and water)?
    1. nucleic acids (wrong)
    2. amino acids (wrong)
    3. carbohydrates (correct)
    4. lipids (wrong)
    5. proteins (wrong)
      Hint
  11. Polysaccharides include the following EXCEPT
    1. cellulose (wrong)
    2. glucose (correct)
    3. starch (wrong)
    4. glycogen (wrong)
    5. all of the above are polysaccharides (wrong)
      Hint
  12. Glucose is a
    1. fatty acid (wrong)
    2. polysaccharide (wrong)
    3. monosaccharide (correct)
    4. hydrocarbon (wrong)
    5. triglyceride (wrong)
      Hint
  13. Some excess glucose is converted into ________ for short-term energy storage in muscles and liver of animals.
    1. DNA (wrong)
    2. RNA (wrong)
    3. glycogen (correct)
    4. sucrose (wrong)
    5. proteins (wrong)
      Hint
  14. A protein that is heated can lose its 3-dimensional shape in a process called
    1. dehydration (wrong)
    2. hydration (wrong)
    3. saturation (wrong)
    4. hydrogenation (wrong)
    5. denaturation (correct)
      Hint
  15. Factors that affect the activity of an enzyme include
    1. DNA and RNA (wrong)
    2. electrons and neutrons (wrong)
    3. products and dividends (wrong)
    4. temperature and pH (correct)
    5. osmosis and diffusion (wrong)
      Hint
  16. The sugar found in DNA (Deoxyribonucleic Acid) is
    1. ribose (wrong)
    2. deoxyribose (correct)
    3. glucose (wrong)
    4. sucrose (wrong)
    5. cellulose (wrong)
      Hint

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