Adenine and Guanine combine together along with Cytosine and Thymine

combining together to form the Purines and Pyridines at high temperatures.

Purines and Pyridines in the tail of a comet can

transform into organic matter containing C, H, O, N & S at high

temperatures

Some of the compounds in the tail of a comet can

transform to Purines and Pyridines at high temperatures

nucleotides present in the tail can transform into

the carbonaceous cell mass of the living organisms at high temperatures.