However, the case for natural beauty in the lab might just speak against it being art after all. Cells contracting into pleasing shapes is just how they aggregate normally, cell culture medium having color is often just an easy indicator for quality control, and all the colors of the rainbow are mostly just used to distinguish between all the information you are trying to squeeze into a graph. It is coincidental. It is a side product. In a very true sense it is like the flower, that appears to us as beautiful, but whose actual purpose is to act as a landings strip for bees.
Unlike art, which derives purpose from its intention, even if that is not beauty, then at least expression, science has no such ulterior motive. It is in its endeavor to discover quite utilitarian, beautiful often, sometimes stunningly so, but never just so. Beautiful art is appreciated for its aesthetics, beautiful science for its gain in knowledge (and sometimes for looking good while doing so).