5 Written Questions
5 Matching Questions
- Hayflick limit
- a A length of DNA that codes for one (or more) polypeptides/proteins. Some may code for RNA or regulate other genes.
- b Structural change to genetic material - either to a gene or to a chromosome.
- c 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.
- d Macromolecule that is a polymer of many amino acids joined by peptide bonds. May comprise more than one polypeptide chains.
- e Specific position on a chromosome, occupied by a specific gene.
5 Multiple Choice Questions
- Gene that can undergo mutations to become an oncogene, which induces tumour formation (cancer).
- Production of new organisms involving fusion of nuclei from male and female gametes, usually from unrelated individuals. Increases genetic variation in the population.
- Made of microtubules, these structures are responsible for providing the framework for segregation of the chromosomes during mitosis and meiosis.
- Alleles present within cells of an individual, for a particular trait/characteristic.
- A 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.
5 True/False Questions
Paternal chromosome → Member of a pair of homologous chromosomes that originally came from the male gamete.
Polarity → Refers to the location of cells with respect to the head end (anterior) or tail end (posterior) of the body.
Crossing over → Macromolecule that is a polymer of many amino acids joined by peptide bonds. May comprise more than one polypeptide chains.
Stop codon → A stretch of DNA consisting of two or more genes that are transcribed together and coregulated.
Apoptosis → 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.