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5 Written questions

5 Matching questions

  1. Operon
  2. Genetic variation
  3. Missense mutation
  4. Discontinuous variation
  5. Phagocytosis
  1. a Term to describe the engulfing by macrophages of vesicles from cells that have undergone apoptosis.
  2. b A stretch of DNA consisting of two or more genes that are transcribed together and coregulated.
  3. c A change in DNA sequence that leads to a change in the amino acid sequence coded for by a gene.
  4. d Variation of genetic information in a gene pool.
  5. e 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 Multiple choice questions

  1. Observable characteristics of an organism.
  2. A sequence of three bases that codes for a single amino acid according to the genetic code.
  3. Alternative term for apoptosis.
  4. Eukaryotic cell or organism that has two different alleles for a specific gene.
  5. The formation of an RNA molecule, using a length of DNA as a template and catalysed by RNA polymerase.

5 True/False questions

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

          

  2. transfer RNAStage of protein/polypeptide synthesis in which the amino acids are assembled at ribosomes according to the genetic code.

          

  3. Coding strandThe DNA strand that is used for assembly of mRNA by RNA polymerase using base-pairing rules. Complementary to the message sequence.

          

  4. Nonsense mutationA 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. DegenerateA term applied to the genetic code that describes the fact that more than one triplet code is used to code for all amino acids other than tryptophan and methionine.

          

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