I'm so embarrassed to ask such a question here, but our molecular biology teacher told us that a double helix of DNA was composed of two DNA molecules linked together by hydrogen bonds. The thing is, until now, I always thought a DNA molecule was composed of two strands, those being polynucleotides, both of them being linked together, and I can't find a link which is saying the same as my teacher, even if it seems technically correct to call a double helix a dimer of two DNA molecules.
So, yeah, that question may sound unimportant and stupid as hell, but I was curious to know what was the exact terminology. Please don't downvote me for that... I already have a low reputation, so let's not make it worse please. :)