These are the codons...they are read from the mRNA in the ribosome.
I'm not sure about number 1 or number 6, but I know that 3 is nucleic acid and 5 is solution.
I think it is NAD, this ensures that the NAD can go back to glycolysis where it can again be reduced and go back through anaerobic respiration.
Winds up the replicated DNA Strand