Chap 1   Chapter 2 Self Quiz: Chemistry   Chap 3

  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 in the diagram?
    1. 8 (wrong)
    2. 10 (wrong)
    3. 11 (wrong)
    4. 18 (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. A solution with a high concentration of hydrogen ions is called a(n)
    1. buffer (wrong)
    2. base (wrong)
    3. alkaline water (wrong)
    4. alcohol (wrong)
    5. acid (correct)
      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. Glucose is a
    1. fatty acid (wrong)
    2. polysaccharide (wrong)
    3. monosaccharide (correct)
    4. hydrocarbon (wrong)
    5. triglyceride (wrong)
      Hint
  12. 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
  13. Some excess glucose is converted into glycogen for short-term energy storage in muscles and ________ of animals.
    1. bladder (wrong)
    2. gallbladder (wrong)
    3. liver (correct)
    4. kidney (wrong)
    5. pancreas (wrong)
      Hint
  14. 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
  15. 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
  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
  17. Nitrogen-containing bases in RNA include the following EXCEPT:
    1. Cytosine (wrong)
    2. Adenine (wrong)
    3. Guanine (wrong)
    4. Uracil (wrong)
    5. Thymine (correct)
      Hint

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