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5 Written questions

5 Matching questions

  1. Frameshift mutation
  2. Non-disjunction
  3. Polysome
  4. Gametes
  5. Allele
  1. a A length of messenger RNA carrying multiple ribosomes at different stages of protein synthesis.
  2. b An alternative version of a gene carrying sequence differences.
  3. c Specialised sex cells. In many organisms the gametes are haploid and are produced by meiosis.
  4. d Failure of members of a homologous pair of chromosomes, or of a pair of chromatids, to separate during nuclear division.
  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. Refers to the location of cells with respect to the head end (anterior) or tail end (posterior) of the body.
  2. Structural change to genetic material - either to a gene or to a chromosome.
  3. Eukaryotic cell or organism having only one set of chromosomes. Denoted by n.
  4. 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.
  5. A stretch of DNA consisting of two or more genes that are transcribed together and coregulated.

5 True/False questions

  1. TranslationStage of protein/polypeptide synthesis in which the amino acids are assembled at ribosomes according to the genetic code.


  2. Stutter mutationA mutation that even though it may change a coding sequence exerts no harmful or beneficial effects.


  3. Crossing overThe DNA strand encompassing a gene that carries the sequence identical to the message sequence.


  4. HomozygousEukaryotic cell or organism that has two identical alleles for a specific gene.


  5. Genetic variationVariation of genetic information in a gene pool.