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5 Written questions

5 Matching questions

  1. deoxyribose
  2. radioactive isotope
  3. Single-strand DNA-binding protein (SSBPs)
  4. double helix
  5. semiconservative model
  1. a The sugar component of DNA nucleotides, having one fewer hydroxyl group than ribose, the sugar component of RNA nucleotides.
  2. b 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.
  3. c The form of native DNA, referring to its two adjacent antiparallel polynucleotide strands wound around an imaginary axis into a spiral shape.
  4. d 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. e An isotope (an atomic form of a chemical element) that is unstable; the nucleus decays spontaneously, giving off detectable particles and energy.

5 Multiple choice questions

  1. An enzyme that catalyzes the lengthening of telomeres in eukaryotic germ cells.
  2. A discontinuously synthesized DNA strand that elongates by means of Okazaki fragments, each synthesized in a 5'3' direction away from the replication fork.
  3. An 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. The less condensed form of eukaryotic chromatin that is available for transcription.
  5. One of two prokaryotic domains, the other being Archaea.

5 True/False questions

  1. origin of replicationSite where the replication of a DNA molecule begins, consisting of a specific sequence of nucleotides.

          

  2. repetitive DNAA Y-shaped region on a replicating DNA molecule where the parental strands are being unwound and new strands are growing.

          

  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. 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.

          

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

          

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