The phosphate is linked to the 5' carbon of the sugar in both RNA and DNA. The nitrogenous bases are adenine(A), guanine(G), cytosine(C), thymine(T), and uracil(U). Adenine and guanine are purines (contains a six membered ring of carbon and nitrogen fused to a five membered ring). Adenine and guanine are both found in DNA and RNA.
Uranium is a naturally occurring weakly radioactive element. High levels of uranium in water may increase the risk of cancer and kidney damage. Most of the uranium that is ingested by food or drink by the human body is excreted, but some amounts are absorbed into the bloodstream and kidneys.
Question: What Is the Most Radioactive Element? Answer: Radioactivity is a measure of the rate an atomic nucleus decomposes into pieces that are more stable. It's somewhat complicated, trying to determine relative radioactivity because there can be many unstable steps in the decay process before an element finally breaks into stable pieces.