Answer:
both have the same DNA , but rna repalces t with u , they both are helix shaped but DNA is a double helix.
DNA is made from ribose, but the ribose in RNA has OH group on carbon 2 and DNA only has a hydrogen on carbon 2.
DNA uses the bases thyamine, adenine, guanine and cytosine, wherase RNA uses uracil instead of thyamine.
mRNA is a single strand of only a few hundred or thousand bases, DNA has many thousands of bases and is double stranded.
tRNA is a strand of RNA pleated in a clover shape. It consists of about 100 base pairs.
rRNA is RNA that binds with protiens to form a ribosome.
These are the main types of RNA.