Respuesta :
The backbone of DNA and RNA is composed of sugar and phosphate.
DNA is double stranded due to interactions between adenine, cytosine, guanine, and thymine, which are nitrogenous bases.
Uracil is a nitrogenous base that is only used with RNA.
Answer:
The answers for the 3 blanks are
1. sugars and phosphates groups
2. bases
3 bases of RNA
Explanation:
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