What are two basic differences between DNA and RNA? RNA is usually single stranded, while DNA is usually double stranded. RNA contains uracil, while DNA contains thymine. RNA is usually double stranded, while DNA is usually single stranded. RNA contains thymine, while DNA contains uracil. RNA doesn't contain cytosine, while DNA doesn't contain adenine.

Both of them are nucleic acids. And that is about the only similarity they share.; )

One of the major differences between the two is that DNA is double-stranded and RNA is single stranded. Also, DNA contains the nucleotide T whereas RNA contains U.

RNA copies the genetic information found within DNA and uses it to assemble protein, as well as ribosomes. Hence, RNA is a crucial part in protein synthesis, being directly involved in it, whereas DNA is indirectly involved in this process.

There are three types of RNA: mRNA (messenger RNA), rRNA (ribosomal RNA) and tRNA (transfer RNA). As far as DNA is concerned, there is only one type of DNA.; ) Another difference.

Also, in some viruses the RNA replaces the DNA but the DNA will never replace the RNA. Yet another difference.