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5 Written questions

5 Matching questions

  1. Mismatch repair
  2. nucleoid
  3. radioactive isotope
  4. primase
  5. nucleosome
  1. a An enzyme that joins RNA nucleotides to make the primer using the parental DNA strand as a template.
  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 The cellular process that uses specific enzymes to remove and replace incorrectly paired nucleotides.
  4. d A dense region of DNA in a prokaryotic cell.
  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. The sugar component of DNA nucleotides, having one fewer hydroxyl group than ribose, the sugar component of RNA nucleotides.
  2. A small protein with a high proportion of positively charged amino acids that binds to the negatively charged DNA and plays a key role in chromatin structure.
  3. The less condensed form of eukaryotic chromatin that is available for transcription.
  4. 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.
  5. A Y-shaped region on a replicating DNA molecule where the parental strands are being unwound and new strands are growing.

5 True/False questions

  1. nucleotide excision repairA dense region of DNA in a prokaryotic cell.

          

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

          

  3. topoisomeraseA protein that breaks, swivels, and rejoins DNA strands. During DNA replication, topoisomerase helps to relieve strain in the double helix ahead of the replication fork.

          

  4. bacteriophageOne of two prokaryotic domains, the other being Archaea.

          

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