Final answer:
The similarity between RNA and DNA lies in the composition of their (d) nucleotides, which consist of a phosphate group, a sugar, and a nitrogenous base. Both RNA and DNA are involved in genetic information transfer and protein synthesis.
Step-by-step explanation:
RNA and DNA have several similarities, but one key similarity is the presence of a phosphate group, a sugar, and a nitrogenous base in their nucleotides(d). This means that both RNA and DNA consist of nucleotides that have a phosphate group, a sugar (ribose in RNA and deoxyribose in DNA), and a base (adenine, cytosine, guanine, and uracil in RNA).
Additionally, both RNA and DNA are involved in genetic information transfer and are essential for the synthesis of proteins. However, it's important to note that RNA is single-stranded, while DNA is double-stranded.