5 Written questions
5 Matching questions
- Hayflick limit
- Genetic variation
- Central dogma
- Silent mutation
- a Variation of genetic information in a gene pool.
- b 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.
- c A length of messenger RNA carrying multiple ribosomes at different stages of protein synthesis.
- 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 The fundamental relationship between DNA, RNA and protein first outlined by Francis Crick in 1958.
5 Multiple choice questions
- A characteristic where both alleles contribute to the phenotype.
- A term applied to the genetic code that describes the fact that more than one triplet code is used to code for all amino acids other than tryptophan and methionine.
- One of three triplet codes (UGA, UAG or UAA) that causes the termination of translation by the ribosome.
- Type of nuclear division. A reduction division. The chromosome number is halved. It involves two divisions. It produces cells that are genetically different from each other and from the parent cell.
- Alternative term for apoptosis.
5 True/False questions
Homeobox genes → Eukaryotic cell or organism that has two identical alleles for a specific gene.
Template strand → The DNA strand that is used for assembly of mRNA by RNA polymerase using base-pairing rules. Complementary to the message sequence.
Non-disjunction → Failure of members of a homologous pair of chromosomes, or of a pair of chromatids, to separate during nuclear division.
Stutter mutation → 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.
Homozygous → Eukaryotic cell or organism that has two different alleles for a specific gene.