5 Written questions
5 Matching questions
- DNA mutation
- Hayflick limit
- Programmed cell death
- a Alternative term for apoptosis.
- b A change to the DNA structure altering the sequence of bases.
- c Large polymer molecule made of many amino acids joined by peptide bonds.
- 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.
- e Having two sets of chromosomes (eukaryotic cell or organism). Denoted by 2n.
5 Multiple choice questions
- Specialised sex cells. In many organisms the gametes are haploid and are produced by meiosis.
- The triplet code recognised by the ribosome that signals the start point for translation. Almost invariably a methionine codon (ATG).
- The fundamental relationship between DNA, RNA and protein first outlined by Francis Crick in 1958.
- Member of a pair of homologous chromosomes that originally came from the male gamete.
- Variation of genetic information in a gene pool.
5 True/False questions
Proto-oncogene → Genes that control the development of the body plan of an organism.
Silent mutation → A change to the DNA structure altering the sequence of bases.
Codominant → A characteristic where both alleles contribute to the phenotype.
Ribosomal RNA → 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.
Homeobox genes → Eukaryotic cell or organism that has two different alleles for a specific gene.