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5 Written questions

5 Matching questions

  1. Polarity
  2. Allele
  3. DNA mutation
  4. Genome
  5. Stutter mutation
  1. a A change to the DNA structure altering the sequence of bases.
  2. b An alternative version of a gene carrying sequence differences.
  3. c Causes an expansion or contraction of a run of identical codons within a gene affecting the length of a run of identical amino acids in the polypeptide.
  4. d All the genetic information within an organism/cell.
  5. e Refers to the location of cells with respect to the head end (anterior) or tail end (posterior) of the body.

5 Multiple choice questions

  1. Three types of RNA that form an important structural and functional role within the ribosome.
  2. A length of DNA that codes for one (or more) polypeptides/proteins. Some may code for RNA or regulate other genes.
  3. Large polymer molecule made of many amino acids joined by peptide bonds.
  4. Specific position on a chromosome, occupied by a specific gene.
  5. 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 True/False questions

  1. Programmed cell deathLarge polymer molecule made of many amino acids joined by peptide bonds.


  2. Segmentation genesGenes that control the development of polarity within a body segment during development.


  3. Hayflick limitA 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. PolysomeA length of messenger RNA carrying multiple ribosomes at different stages of protein synthesis.


  5. Template strandThe DNA strand encompassing a gene that carries the sequence identical to the message sequence.