5 Written Questions
5 Matching Questions
- Sexual reproduction
- DNA mutation
- Ribosomal RNA
- a A substance that controls the pattern of tissue development. It is produced in a particular region of a developing organism. It diffuses to other cells, which then enter a specific developmental pathway.
- b A change to the DNA structure altering the sequence of bases.
- c Structural change to genetic material - either to a gene or to a chromosome.
- d Three types of RNA that form an important structural and functional role within the ribosome.
- e Production of new organisms involving fusion of nuclei from male and female gametes, usually from unrelated individuals. Increases genetic variation in the population.
5 Multiple Choice Questions
- The way in which the 64 possible base triplets map onto the 20 amino acids that are used in polypeptide chains.
- Characteristic coded for by one gene.
- Large polymer molecule made of many amino acids joined by peptide bonds.
- Pair of synapsed (joined) homologous chromosomes during prophase and metaphase of meiosis I.
- 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.
5 True/False Questions
Proto-oncogene → Macromolecule that is a polymer of many amino acids joined by peptide bonds. May comprise more than one polypeptide chains.
Discontinuous variation → 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.
Coding strand → The DNA strand encompassing a gene that carries the sequence identical to the message sequence.
transfer RNA → Stage of protein/polypeptide synthesis in which the amino acids are assembled at ribosomes according to the genetic code.
Chiasmata → Pair of synapsed (joined) homologous chromosomes during prophase and metaphase of meiosis I.