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5 Written questions

5 Matching questions

  1. Ribosomal RNA
  2. Homeotic selector genes
  3. Insertion/deletion mutation
  4. Polarity
  5. Paternal chromosome
  1. a Refers to the location of cells with respect to the head end (anterior) or tail end (posterior) of the body.
  2. b A change in DNA sequence involving the introduction or loss of 1- 1000s of bases.
  3. c Member of a pair of homologous chromosomes that originally came from the male gamete.
  4. d Three types of RNA that form an important structural and functional role within the ribosome.
  5. e These direct the development of individual body segments. They are master genes that control other regulatory genes.

5 Multiple choice questions

  1. A length of DNA that codes for one (or more) polypeptides/proteins. Some may code for RNA or regulate other genes.
  2. 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.
  3. A mutation that even though it may change a coding sequence exerts no harmful or beneficial effects.
  4. Eukaryotic organisms or cell with more than two sets of chromosomes.
  5. The way in which the 64 possible base triplets map onto the 20 amino acids that are used in polypeptide chains.

5 True/False questions

  1. Sexual reproductionProduction of new organisms involving fusion of nuclei from male and female gametes, usually from unrelated individuals. Increases genetic variation in the population.


  2. AlleleSmall vesicle formed that breaks away from the cell membrane during apoptosis


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


  4. MeiosisType of nuclear division. A reduction division. The chromosome number is halved. It involves two divisions. It produces cells that are genetically different from each other and from the parent cell.


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


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