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5 Written Questions

5 Matching Questions

  1. heterochromatin
  2. semiconservative model
  3. telomere
  4. histone
  5. nucleoid region
  1. a 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.
  2. b A dense region of DNA in a prokaryotic cell.
  3. c 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. d Eukaryotic chromatin that remains highly compacted during interphase and is generally not transcribed.
  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. Site where the replication of a DNA molecule begins, consisting of a specific sequence of nucleotides.
  2. An isotope (an atomic form of a chemical element) that is unstable; the nucleus decays spontaneously, giving off detectable particles and energy.
  3. An enzyme that catalyzes the lengthening of telomeres in eukaryotic germ cells.
  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. The cellular process that uses specific enzymes to remove and replace incorrectly paired nucleotides.

5 True/False Questions

  1. repetitive DNANucleotide sequences, usually noncoding, that are present in many copies in a eukaryotic genome. The repeated units may be short and arranged tandemly (in series) or long and dispersed in the genome.


  2. transformation(1) The conversion of a normal animal cell to a cancerous cell. (2) A change in genotype and phenotype due to the assimilation of external DNA by a cell.


  3. bacteriaMember of the prokaryotic domain Bacteria.


  4. bacteriumMember of the prokaryotic domain Bacteria.


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


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