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The structure of DNA, dna_nucleotide_structure, unnamed, 3-s2.0…

- - - - Messenger RNA (mRNA)
        
        Which forms a copy the DNA code
      - Transfer RNA (tRNA)
        
        Carries amino acids to the ribosomes to make the protein
      - Ribosomal RNA (rRNA)
        
        ribosomes are made of RNA & protein
- - - - Adenine (A)
      - Thymine (T)
      - Cytosine (C)
      - Guanine (G)
- - - - Each codon codes for a particuar amino acid (CCU codes for the amino acid proline, and AUG codes for methionine)
  - - - Which is complementary to a particular codon on the mRNA
- - - - For example, keratin in the skin or myosin in muscles. Other proteins have particular functions.
        
        Hemaglobin and Hormones
    - - A sequence of three bases in the template strand of DNA codes for amino acids
        
        For example, the base sequence TGT codes for the amino acids cyteine
        
        Because three bases are needed to code for one amino acid, the DNA code is a triplet code
        
        The sequence of triplets that codes for all the amino acids in a protein is a gene