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5 Written questions

5 Matching questions

  1. Okazaki fragment
  2. bacteria
  3. double helix
  4. semiconservative model
  5. deoxyribose
  1. a One of two prokaryotic domains, the other being Archaea.
  2. b The form of native DNA, referring to its two adjacent antiparallel polynucleotide strands wound around an imaginary axis into a spiral shape.
  3. c 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.
  4. d The sugar component of DNA nucleotides, having one fewer hydroxyl group than ribose, the sugar component of RNA nucleotides.
  5. e 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 Multiple choice questions

  1. The complex of DNA and proteins that makes up a eukaryotic chromosome. When the cell is not dividing, chromatin exists in its dispersed form, as a mass of very long, thin fibers that are not visible with a light microscope.
  2. Site where the replication of a DNA molecule begins, consisting of a specific sequence of nucleotides.
  3. A virus that infects bacteria; also called a bacteriophage.
  4. An enzyme that catalyzes the lengthening of telomeres in eukaryotic germ cells.
  5. 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.

5 True/False questions

  1. Mismatch repairOne of two prokaryotic domains, the other being Archaea.


  2. replication forkNucleotide 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.


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


  4. pyrimidineOne of two types of nitrogenous bases found in nucleotides, characterized by a six-membered ring. Cytosine (C), thymine (T), and uracil (U) are pyrimidines.


  5. 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.