Two of the five bases in nucleic acids, adenine (2) and guanine (3), are purines. In DNA, these bases form hydrogen bonds with their complementary pyrimidines thymine and cytosine, respectively. This is called complementary base pairing.In RNA, the complement of adenine is uracil instead of thymine.Other notable purines are hypoxanthine (4), xanthine (5), theobromine (6), caffeine (7), uric acid (8) and isoguanine (9).his is called complementary base pairing. In RNA, the complement of adenine is uracil instead of thymine. Other notable purines are hypoxanthine (4), xanthine (5), theobromine (6), caffeine (7), uric acid (8) and isoguanine (9).
The last or the lowermost color in a rainbow is violet. This color is a combination of the colors red and blue. It is the highest and the subtlest specialization of light, as it is at the opposite end of the color red. This color is viewed as the completion as well as the beginning of the energy vibration.
The flag was originally created with eight colors, but pink and turquoise were removed for production purposes, and since 1979 it has consisted of six colored stripes. It is most commonly flown with the red stripe on top, as the colors appear in a natural rainbow.he choice of the rainbow in the form of a flag harkens back to the rainbow as a symbol of biblical promise. According to the Bible, God first created the rainbow as a sign to Noah that there would never again be a world-wide flood, also known as the Rainbow covenant.