5 Written questions
5 Matching questions
- Genetic variation
- Missense mutation
- Discontinuous variation
- a Term to describe the engulfing by macrophages of vesicles from cells that have undergone apoptosis.
- b A stretch of DNA consisting of two or more genes that are transcribed together and coregulated.
- c A change in DNA sequence that leads to a change in the amino acid sequence coded for by a gene.
- d Variation of genetic information in a gene pool.
- e 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.
5 Multiple choice questions
- Observable characteristics of an organism.
- A sequence of three bases that codes for a single amino acid according to the genetic code.
- Alternative term for apoptosis.
- Eukaryotic cell or organism that has two different alleles for a specific gene.
- The formation of an RNA molecule, using a length of DNA as a template and catalysed by RNA polymerase.
5 True/False questions
Neutral mutation → A mutation that even though it may change a coding sequence exerts no harmful or beneficial effects.
transfer RNA → Stage of protein/polypeptide synthesis in which the amino acids are assembled at ribosomes according to the genetic code.
Coding strand → The DNA strand that is used for assembly of mRNA by RNA polymerase using base-pairing rules. Complementary to the message sequence.
Nonsense 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.
Degenerate → 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.