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5 Written Questions

5 Matching Questions

  1. primase
  2. heterochromatin
  3. telomere
  4. chromatin
  5. pyrimidine
  1. a An enzyme that joins RNA nucleotides to make the primer using the parental DNA strand as a template.
  2. b Eukaryotic chromatin that remains highly compacted during interphase and is generally not transcribed.
  3. c One of two types of nitrogenous bases found in nucleotides, characterized by a six-membered ring. Cytosine (C), thymine (T), and uracil (U) are pyrimidines.
  4. d 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.
  5. e 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.

5 Multiple Choice Questions

  1. 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.
  2. A repair system that removes and then correctly replaces a damaged segment of DNA using the undamaged strand as a guide.
  3. 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.
  4. The less condensed form of eukaryotic chromatin that is available for transcription.
  5. A virus that infects bacteria; also called a bacteriophage.

5 True/False Questions

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

          

  2. DNA polymeraseA 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).

          

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

          

  4. telomeraseThe 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.

          

  5. 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.

          

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