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5 Written questions

5 Matching questions

  1. Crossing over
  2. Ribosomal RNA
  3. Codon
  4. Degenerate
  5. transfer RNA
  1. a A sequence of three bases that codes for a single amino acid according to the genetic code.
  2. b Where non-sister chromatids exchange alleles during prophase I of meiosis.
  3. c Three types of RNA that form an important structural and functional role within the ribosome.
  4. d A 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.
  5. e A short length of about 100 RNA nucleotides that adopts a clover leaf structure and carries an amino acid to the ribosome to be incorporated into a growing polypeptide chain.

5 Multiple choice questions

  1. Alleles present within cells of an individual, for a particular trait/characteristic.
  2. Observable characteristics of an organism.
  3. Eukaryotic cell or organism that has two identical alleles for a specific gene.
  4. Groups of homeobox genes. More complex organisms have more such groups, probably due to a mutation that duplicated them.
  5. A change in DNA sequence involving the introduction or loss of 1- 1000s of bases.

5 True/False questions

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

          

  2. Silent 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.

          

  3. Nonsense mutationA change in DNA sequence that introduces a premature stop codon within a DNA coding sequence.

          

  4. LocusSpecific position on a chromosome, occupied by a specific gene.

          

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

          

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