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5 Written questions

5 Matching questions

  1. nucleosome
  2. bacteria
  3. nucleoid region
  4. origin of replication
  5. heterochromatin
  1. a Eukaryotic chromatin that remains highly compacted during interphase and is generally not transcribed.
  2. b One of two prokaryotic domains, the other being Archaea.
  3. c A dense region of DNA in a prokaryotic cell.
  4. d Site where the replication of a DNA molecule begins, consisting of a specific sequence of nucleotides.
  5. e The basic, bead-like unit of DNA packing in eukaryotes, consisting of a segment of DNA wound around a protein core composed of two copies of each of four types of histone.

5 Multiple choice questions

  1. A Y-shaped region on a replicating DNA molecule where the parental strands are being unwound and new strands are growing.
  2. The DNA strand that provides the pattern, or template, for ordering the sequence of nucleotides in an RNA transcript.
  3. The tandemly repetitive DNA at the end of a eukaryotic chromosome's DNA molecule that protects the organism's genes from being eroded during successive rounds of replication. See also repetitive DNA.
  4. A virus that infects bacteria; also called a bacteriophage.
  5. A discontinuously synthesized DNA strand that elongates by means of Okazaki fragments, each synthesized in a 5'3' direction away from the replication fork.

5 True/False questions

  1. bacteriumMember of the prokaryotic domain Bacteria.


  2. semiconservative modelType of DNA replication in which the replicated double helix consists of one old strand, derived from the old molecule, and one newly made strand.


  3. DNA polymeraseAn enzyme that catalyzes the elongation of new DNA (for example, at a replication fork) by the addition of nucleotides to the 3' end of an existing chain. There are several different DNA polymerases; DNA polymerase III and DNA polymerase I play major roles in DNA replication in prokaryotes.


  4. Leading strandThe new complementary DNA strand synthesized continuously along the template strand toward the replication fork in the mandatory 5'?3' direction.


  5. primerAn enzyme that joins RNA nucleotides to make the primer using the parental DNA strand as a template.