CHEDDER CHEESE: Pasteurised Milk, Salt, Starter Cultures, Non-Animal Rennet, Non Animal Lipase. HAM SLICE: Pork, WAter, Acidity Regulators (326, 262), Salt, Emulsifer (451), Sugar, Dextrose (Maize), Antioxidant (316), Sodium Nitrite (250), Colours (Sorghum Husk Extract 160b).
Nucleotides in DNA contain four different nitrogenous bases: Thymine, Cytosine, Adenine, or Guanine. There are two groups of bases: Pyrimidines: Cytosine and Thymine each have a single six-member ring. Purines: Guanine and Adenine each have a double ring made up of a five-atom ring attached by one side to a six-atom ring. The order of nucleotides along DNA polymers encode the genetic information carried by DNA.
The four nitrogen bases found in DNA are adenine, cytosine, guanine, and thymine. Each of these bases are often abbreviated a single letter: A (adenine), C (cytosine), G (guanine), T (thymine). The bases come in two categories: thymine and cytosine are pyrimidines, while adenine and guanine are purines ().