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5 Written questions

5 Matching questions

  1. Phagocytosis
  2. Stop codon
  3. Frameshift mutation
  4. Locus
  5. Chiasmata
  1. a Specific position on a chromosome, occupied by a specific gene.
  2. b Term to describe the engulfing by macrophages of vesicles from cells that have undergone apoptosis.
  3. c One of three triplet codes (UGA, UAG or UAA) that causes the termination of translation by the ribosome.
  4. d The points where non-sister chromatids within a bivalent join, where they cross over.
  5. e A change in the DNA within a gene involving the insertion or deletion of a number of bases that is not a multiple of three. This causes the downstream gene sequence to be scrambled because the correct reading frame is lost.

5 Multiple choice questions

  1. Programmed cell death. An orderly process by which cells self-destruct in an orderly fashion after a certain number of cell divisions, or if they cannot repair DNA damage.
  2. Groups of homeobox genes. More complex organisms have more such groups, probably due to a mutation that duplicated them.
  3. Eukaryotic cell or organism that has two different alleles for a specific gene.
  4. Specialised sex cells. In many organisms the gametes are haploid and are produced by meiosis.
  5. Genetic variation where there are distinct phenotypic categories. Usually controlled by one gene to a few genes. Examples include cystic fibrosis, shape of earlobes in humans and height in pea plants.

5 True/False questions

  1. MutationA stretch of DNA consisting of two or more genes that are transcribed together and coregulated.

          

  2. Paternal chromosomeMember of a pair of homologous chromosomes that originally came from the male gamete.

          

  3. PolypeptideLarge polymer molecule made of many amino acids joined by peptide bonds.

          

  4. Homeotic selector genesGenes that control the development of the body plan of an organism.

          

  5. DNA mutationA change to the DNA structure altering the sequence of bases.

          

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