5 Written questions
5 Matching questions
- DNA mutation
- Stutter mutation
- a A change to the DNA structure altering the sequence of bases.
- b An alternative version of a gene carrying sequence differences.
- c 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.
- d All the genetic information within an organism/cell.
- e Refers to the location of cells with respect to the head end (anterior) or tail end (posterior) of the body.
5 Multiple choice questions
- Three types of RNA that form an important structural and functional role within the ribosome.
- A length of DNA that codes for one (or more) polypeptides/proteins. Some may code for RNA or regulate other genes.
- Large polymer molecule made of many amino acids joined by peptide bonds.
- Specific position on a chromosome, occupied by a specific gene.
- 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.
5 True/False questions
Programmed cell death → Large polymer molecule made of many amino acids joined by peptide bonds.
Segmentation genes → Genes that control the development of polarity within a body segment during development.
Hayflick limit → 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.
Polysome → A length of messenger RNA carrying multiple ribosomes at different stages of protein synthesis.
Template strand → The DNA strand encompassing a gene that carries the sequence identical to the message sequence.