It should be noted that in the case of a deoxyribonucleic acid (DNA) base pairing, Adenine always pairs with thymine, guanine with cytosine and vice-versa. In such a case, the number of hydrogen bonds formed between an adenine and a thymine would be 2, whereas the number of hydrogen bonds formed between a guanine and cytosine is 3.
Hence, it is imperative as the number of hydrogen bonds increases, the stability of the component would be increased proportionately. This proves that organisms such as extremophiles that are thriving under extremes of temperatures would be composed of a higher quantity of guanine-cytosine ratio for improving the stability of the DNA molecule.