DNA

• Describe how a gene is a code for the production of a polypeptide

  do not refer to transcription or translation in your answer

  -Because the base sequence

  -consists of triplets

  -the triplets determine the primary structure of the polypeptide/the order of the amino acid sequence
• Define the term exon:

  a base sequence that codes for the sequence of amino acids in a polypeptide chain. (coding parts of DNA)
• Describe how phosphodiester bonds form between 2 nucleotides within a DNA molecule:

  -formed between the phosphate and deoxyribose

  -during a condensation reaction with the release of water

  -catalysed using the DNA polymerase enzyme
• Define 'non-coding base sequences' and describe where the non-coding multiple repeats are positioned in the genome

  DNA that does not code for amino acids/does not code for protein

  positioned between genes