Chapter 16: The Molecular Basis of Inheritance

  1. DNA is a double helix, with the ________ backbones on the ________ .
    1. sugar-phosphate, outside
    2. sugar-phosphate, inside
    3. nitrogenous base, outside
    4. nitrogenous base, inside
    5. none of the choices
  2. Which enzyme is NOT involved in DNA replication?
    1. primase
    2. helicase
    3. ligase
    4. telomerase
    5. DNA polymerase
  3. DNA polymerization always proceeds in which direction?
    1. 5' to 3'
    2. 1' to 5'
    3. 3' to 5'
    4. 5' to 1'
    5. 1' to 3'
  4. During termination, the enzyme ________ joins together Okazaki fragments on the ________ strand.
    1. ligase, lagging
    2. ligase, leading
    3. primase, lagging
    4. primase, leading
    5. helicase, leading
  5. In eukaryotes, DNA is bound with proteins called
    1. ribosomes.
    2. centrosomes.
    3. histones.
    4. chromosomes.
    5. proteasomes.
  6. The small DNA "beads" (see diagram at right) forming a 10-nm fiber are called
    1. ribosomes.
    2. nucleosomes.
    3. centrosomes.
    4. centromeres.
    5. proteasomes.