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AP Biology-Ch 16 The Molecular Basis of Inheretance Test

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5 Written Questions

5 Matching Questions

  1. semiconservative model
  2. nucleosome
  3. Okazaki fragment
  4. nucleoid region
  5. telomerase
  1. a A dense region of DNA in a prokaryotic cell.
  2. b An enzyme that catalyzes the lengthening of telomeres in eukaryotic germ cells.
  3. c 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.
  4. d A short segment of DNA synthesized away from the replication fork on a template strand during DNA replication, many of which are joined together to make up the lagging strand of newly synthesized DNA.
  5. e 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.

5 Multiple Choice Questions

  1. An enzyme that joins RNA nucleotides to make the primer using the parental DNA strand as a template.
  2. An enzyme that untwists the double helix of DNA at the replication forks, separating the two strands and making them available as template strands.
  3. The 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.
  4. An 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. A virus that infects bacteria; also called a bacteriophage.

5 True/False Questions

  1. heterochromatinEukaryotic chromatin that remains highly compacted during interphase and is generally not transcribed.

          

  2. deoxyriboseAn enzyme that catalyzes the lengthening of telomeres in eukaryotic germ cells.

          

  3. primerA 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.

          

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

          

  5. Mismatch repairEukaryotic chromatin that remains highly compacted during interphase and is generally not transcribed.

          

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