J 2.2 What will the mRNA codon be for the bases numbered 57 2.3 Name the bonds that hold the two nitrogen bases together to form a helix. 2.4 Place the diagrams (I-IV) in the correct sequence. 2.5 State why the exact replication of DNA is necessary. 2.6 Who was/were awarded the Nobel Prize for developing a model of DNA? 2.7 Name the three components of a nucleotide 2.8 Which organic substance assists in controlling DNA replication? 2.9 Using the information contained in the diagrams, write an account on DNA replication (4) (2) (1) (4) (2) (1) (3) (1) (6)​