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5 Written questions

5 Matching questions

  1. bacteria
  2. nucleosome
  3. euchromatin
  4. telomerase
  5. template strand
  1. a The less condensed form of eukaryotic chromatin that is available for transcription.
  2. b An enzyme that catalyzes the lengthening of telomeres in eukaryotic germ cells.
  3. c One of two prokaryotic domains, the other being Archaea.
  4. d 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. e The DNA strand that provides the pattern, or template, for ordering the sequence of nucleotides in an RNA transcript.

5 Multiple choice questions

  1. Eukaryotic chromatin that remains highly compacted during interphase and is generally not transcribed.
  2. A repair system that removes and then correctly replaces a damaged segment of DNA using the undamaged strand as a guide.
  3. A dense region of DNA in a prokaryotic cell.
  4. 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. 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 True/False questions

  1. double helixThe form of native DNA, referring to its two adjacent antiparallel polynucleotide strands wound around an imaginary axis into a spiral shape.

          

  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. deoxyriboseThe sugar component of DNA nucleotides, having one fewer hydroxyl group than ribose, the sugar component of RNA nucleotides.

          

  4. x-ray crystallographyA linking enzyme essential for DNA replication; catalyzes the covalent bonding of the 3' end of one DNA fragment (such as an Okazaki fragment) to the 5' end of another DNA fragment (such as a growing DNA chain).

          

  5. DNA ligaseA linking enzyme essential for DNA replication; catalyzes the covalent bonding of the 3' end of one DNA fragment (such as an Okazaki fragment) to the 5' end of another DNA fragment (such as a growing DNA chain).

          

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