So we have carbon atom number one. So one, prime carbon number two, two, prime carbon number three, three, prime carbon number four, prime and carbon number five, five, prime. And the only difference between these two sugars is the fact that on the ribosugar we have this hydroxyl group attached to carbon number two. But in the deoxyribosugar, deoxy means we don't have that hydroxyl group attached to the second carbon. So although both DNA and RNA molecules contain sugar components in their nucleotides DNA contain DNA contain a deoxyribosugar. And what that means is it's simply a ribosugar that does not have a hydroxyl group attached to that second carbon.