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5 Written Questions

5 Matching Questions

  1. Gene
  2. Mutation
  3. Protein
  4. Locus
  5. Hayflick limit
  1. a A length of DNA that codes for one (or more) polypeptides/proteins. Some may code for RNA or regulate other genes.
  2. b Structural change to genetic material - either to a gene or to a chromosome.
  3. c A reference to the fact that normal body cells can only divide a finite number of times, normally about 50 mitotic divisions. In contrast, tumour cells are essentially immortal.
  4. d Macromolecule that is a polymer of many amino acids joined by peptide bonds. May comprise more than one polypeptide chains.
  5. e Specific position on a chromosome, occupied by a specific gene.

5 Multiple Choice Questions

  1. Gene that can undergo mutations to become an oncogene, which induces tumour formation (cancer).
  2. Production of new organisms involving fusion of nuclei from male and female gametes, usually from unrelated individuals. Increases genetic variation in the population.
  3. Made of microtubules, these structures are responsible for providing the framework for segregation of the chromosomes during mitosis and meiosis.
  4. Alleles present within cells of an individual, for a particular trait/characteristic.
  5. A change in DNA sequence within a gene that does not lead to a change in the amino acid sequence due to the degeneracy of the genetic code.

5 True/False Questions

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

          

  2. PolarityRefers to the location of cells with respect to the head end (anterior) or tail end (posterior) of the body.

          

  3. Crossing overMacromolecule that is a polymer of many amino acids joined by peptide bonds. May comprise more than one polypeptide chains.

          

  4. Stop codonA stretch of DNA consisting of two or more genes that are transcribed together and coregulated.

          

  5. ApoptosisProgrammed 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.

          

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