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5 Written questions

5 Matching questions

  1. bacteria
  2. Single-strand DNA-binding protein (SSBPs)
  3. primer
  4. replication fork
  5. nucleosome
  1. a A short stretch of RNA with a free 3' end, bound by complementary base pairing to the template strand, that is elongated with DNA nucleotides during DNA replication.
  2. b 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.
  3. c One of two prokaryotic domains, the other being Archaea.
  4. d A Y-shaped region on a replicating DNA molecule where the parental strands are being unwound and new strands are growing.
  5. e A protein that binds to the unpaired DNA strands during DNA replication, stabilizing them and holding them apart while they serve as templates for the synthesis of complementary strands of DNA.

5 Multiple choice questions

  1. A dense region of DNA in a prokaryotic cell.
  2. An enzyme that joins RNA nucleotides to make the primer using the parental DNA strand as a template.
  3. The DNA strand that provides the pattern, or template, for ordering the sequence of nucleotides in an RNA transcript.
  4. An enzyme that untwists the double helix of DNA at the replication forks, separating the two strands and making them available as template strands.
  5. The complex of DNA and proteins that makes up a eukaryotic chromosome. When the cell is not dividing, chromatin exists in its dispersed form, as a mass of very long, thin fibers that are not visible with a light microscope.

5 True/False questions

  1. DNA ligaseAn enzyme that cuts DNA or RNA, either removing one or a few bases or hydrolyzing the DNA or RNA completely into its component nucleotides.


  2. telomereThe 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.


  3. telomeraseAn enzyme that catalyzes the lengthening of telomeres in eukaryotic germ cells.


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


  5. 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.


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