HideShow resource information

D.N.A contains Genes which are instructions for Proteins.

  • Genes are sections of D.N.A. that are found on chromosomes.
  • Genes code for proteins - they contain the instructions to make them.
  • Proteins are made from amino acids.
  • Different proteins have a different number and order of amino acids.
  • Its the order of the nucleotide bases that determines the order of amino acids in a particular protein.
  • Each amino acid is coded for by a sequence of 3 bases .(a triplet). in a gene.
  • Different sequences of bases code for different amino acids.

Not all of the D.N.A in eukaryotic cells code for proteins .

  • Genes in eukaryotic D.N.A contains sections that dont code for amino acids.
  • These are called INTRONS.
  • Introns are removed during protein synthesis so only the useful parts of D.N.A are used. These are EXONS.

Nature and Development of organisms is determined by genes.

  • Enzymes speed up most of out metabolic pathways, the chemical reactions that occur in the body. These pathways determine how we grow and develop.
  • Because enzymes control the metabolic pathways, they contribute to our development, and ultimately what we look like. Phenotype.
  • All enzymes are proteins, which are built using the instructions contained within…


No comments have yet been made

Similar Biology resources:

See all Biology resources »See all DNA, genetics and evolution resources »