We know that in a cell there is a nucleus that is smaller than the cell. And then in that nucleus consist of 46 chromosome that of course smaller than that nucleus. In a chromosome there are very very many genes arrange DNA. And people (the scientists) can also know that there are many component of the DNA: deoksiribosa, phosphate group, nitrogen base -- timin, guanin, sitosin, adenin. So we can conclude that scientists can know the very very scrutiny processes from the very small ones to the bigger ones. From molecules (even atom, subatom, and so on) to the manifestation of the diseases that are caused by the "mistake" of gene or chromosomes.
We can see a cell with conventional microscope. But how can we see the smaller than that in details? After micron, there are still nano, pico, femto, and maybe no limit for the smallest. Maybe for biochemistry students they can understand expecially they have the instruments to "see" and "analize". But how about common students (for example midwifery students). How to explain that the mutation of the genes (codon) can cause diseases (for example fibrosis cystic)?
Sometimes it seems too abstract and nonsense to understand the biochemistry by our midwifery students.
I think the best way to teach this to midwifery students or any students for that matter is to not bombard students with all this information at once, or attempt to share this information at one lesson but to rather to break it down into 3 lessons whereby, in the first lesson you can look at the structure of the cell and the nucleus as well as the contents of this nucleus. The next lesson you will then go deeper into things and so on. Also try to make use of teaching aids such as videos, attach educational videos to your presentation to make it more interesting. Hope it helps but most importantly have more faith in your students, they have a great capacity to understand complex things.
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