I think only twice but I'm not for sure
<span>They are composed of similar materials: DNA is a deoxyribonucleotide polymer while RNA is a ribonucleotide polymer. A nucleotide is composed of a nitrogenous base, a sugar, and a phosphate group. In ribonucleotides, the sugar is ribose, while in deoxynucleotides, the sugar is deoxyribose. Adenine, guanine, and cytosine are nitrogenous bases in both DNA and RNA, while thymine is found only in DNA and uracil is found only in RNA.</span>
Answer:
Actually, the key to energy production lies with the phosphate groups. Breaking the phosphate bond is an exothermic reaction. So, when ATP loses one or two phosphate groups, energy is released. More energy is released breaking the first phosphate bond than the second.
Explanation:
Substances made from two or more different elements are a compound
