structure

• what is a gene?

  sequence of bases on a DNA that codes for a sequence of AA in a pp chain
• genome?

  all the genes of an individual
• DNA nucleotides? (PSB)

  • DNA is a polymer, nucleotides are monomers
  • P= phosphate (links to other nucleotide)
  • S= deoxyribose sugar (5 carbon sugar, links to phosphate)
  • B= organic base (responsible for genetic code, 4 bases)
• DNA chain?

  nucleotides link via condensation reactions, there are 4 bases:

  • adenine
  • guanine
  • cytosine
  • thymine

  A + T (2 hydrogen bonds), C + G (3 hydrogen bonds)

  phophate and sugar join via phosphodiester bond, bases form via hydrogen bonds