5 Written questions
5 Matching questions
- Stutter mutation
- Silent mutation
- Spindle fibres
- a Made of microtubules, these structures are responsible for providing the framework for segregation of the chromosomes during mitosis and meiosis.
- b 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.
- c 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.
- d Stage of protein/polypeptide synthesis in which the amino acids are assembled at ribosomes according to the genetic code.
- e 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 Multiple choice questions
- Genes that control the development of polarity within a body segment during development.
- An alternative version of a gene carrying sequence differences.
- Where non-sister chromatids exchange alleles during prophase I of meiosis.
- Macromolecule that is a polymer of many amino acids joined by peptide bonds. May comprise more than one polypeptide chains.
- Having two sets of chromosomes (eukaryotic cell or organism). Denoted by 2n.
5 True/False questions
Coding strand → The DNA strand encompassing a gene that carries the sequence identical to the message sequence.
Genetic code → The way in which the 64 possible base triplets map onto the 20 amino acids that are used in polypeptide chains.
Polarity → Refers to the location of cells with respect to the head end (anterior) or tail end (posterior) of the body.
Bleb → Small vesicle formed that breaks away from the cell membrane during apoptosis
Kinetochore → Structure formed on the centromere that attaches the chromosomes to the spindle fibres during mitosis and meiosis.