No, DNA (Deoxyribonucleic acid) is not a double strand of RNA (Ribonucleic acid). While both DNA and RNA are nucleic acids, they have distinct differences in their structure and composition.

Here are the main differences:

1. Sugar molecule: DNA contains deoxyribose, whereas RNA contains ribose.
2. Base composition: DNA contains the bases adenine (A), guanine (G), cytosine (C), and thymine (T), whereas RNA contains adenine (A), guanine (G), cytosine (C), and uracil (U) instead of thymine.
3. Double-stranded: DNA is typically double-stranded, with two complementary strands twisted together in a double helix. RNA is usually single-stranded, but can form secondary structures like stem-loops.
4. Stability: DNA is generally more stable than RNA due to its double-stranded nature and the presence of thymine, which provides additional stability.

DNA and RNA perform different functions in the cell:

· DNA stores genetic information and passes it to the next generation.
· RNA plays roles in protein synthesis, catalysis, and gene regulation.

In summary, DNA is not a double strand of RNA; it’s a distinct molecule with its own unique structure and functions.