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5 Written questions

5 Matching questions

  1. Polypeptide
  2. DNA mutation
  3. Diploid
  4. Hayflick limit
  5. Programmed cell death
  1. a Alternative term for apoptosis.
  2. b A change to the DNA structure altering the sequence of bases.
  3. c Large polymer molecule made of many amino acids joined by peptide bonds.
  4. d 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.
  5. e Having two sets of chromosomes (eukaryotic cell or organism). Denoted by 2n.

5 Multiple choice questions

  1. Specialised sex cells. In many organisms the gametes are haploid and are produced by meiosis.
  2. The triplet code recognised by the ribosome that signals the start point for translation. Almost invariably a methionine codon (ATG).
  3. The fundamental relationship between DNA, RNA and protein first outlined by Francis Crick in 1958.
  4. Member of a pair of homologous chromosomes that originally came from the male gamete.
  5. Variation of genetic information in a gene pool.

5 True/False questions

  1. Proto-oncogeneGenes that control the development of the body plan of an organism.


  2. Silent mutationA change to the DNA structure altering the sequence of bases.


  3. CodominantA characteristic where both alleles contribute to the phenotype.


  4. Ribosomal RNAA 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. Homeobox genesEukaryotic cell or organism that has two different alleles for a specific gene.


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