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5 Written questions

5 Matching questions

  1. semiconservative model
  2. radioactive isotope
  3. primer
  4. x-ray crystallography
  5. bacterium
  1. a Member of the prokaryotic domain Bacteria.
  2. b An isotope (an atomic form of a chemical element) that is unstable; the nucleus decays spontaneously, giving off detectable particles and energy.
  3. c Type of DNA replication in which the replicated double helix consists of one old strand, derived from the old molecule, and one newly made strand.
  4. d A technique that depends on the diffraction of an X-ray beam by the individual atoms of a crystallized molecule to study the three-dimensional structure of the molecule.
  5. e 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.

5 Multiple choice questions

  1. The cellular process that uses specific enzymes to remove and replace incorrectly paired nucleotides.
  2. 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.
  3. A Y-shaped region on a replicating DNA molecule where the parental strands are being unwound and new strands are growing.
  4. A dense region of DNA in a prokaryotic cell.
  5. One of two types of nitrogenous bases found in nucleotides, characterized by a six-membered ring. Cytosine (C), thymine (T), and uracil (U) are pyrimidines.

5 True/False questions

  1. heterochromatinThe less condensed form of eukaryotic chromatin that is available for transcription.

          

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

          

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

          

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

          

  5. euchromatinThe less condensed form of eukaryotic chromatin that is available for transcription.