Chapter 20: Biotechnology

  1. ________ are circular DNA molecules that replicate separately from the bacterial chromosome.
    1. Plasmids
    2. Plastids
    3. Capsids
    4. Chromatids
    5. Phospholipids
  2. Complementary sticky ends produced by restriction enzymes can be re-sealed with the enzyme
    1. DNA ligase.
    2. DNA polymerase.
    3. RNA polymerase.
    4. reverse transcriptase.
    5. transcriptase.
  3. The polymerase chain reaction (PCR) uses ________ in the annealing step in its cycle.
    1. primers
    2. plasmids
    3. ribosomes
    4. nucleosomes
    5. phospholipids
  4. Southern blotting uses ________ to separate restriction fragments
    1. autoradiographs
    2. probes
    3. gel electrophoresis
    4. nitrocellulose paper
    5. fingerprints
  5. A(n) ________ cell can reverse its differentiation and then give rise to all the cell types.
    1. totipotent.
    2. pluripotent.
    3. omnipotent.
    4. impotent.
    5. amphipotent.