Which term means that DNA digestion was not complete?

Correct answer: Partial digestion

The governing concept is the extent of restriction-enzyme digestion. Partial digestion means that a restriction enzyme has cut only some available recognition sites or only some DNA molecules, rather than cleaving every susceptible site. Consequently, an experiment may contain completely cut fragments, larger partially cut fragments, and sometimes uncut DNA. This mixture can produce extra or unexpected bands during gel electrophoresis. Option A is correct because it directly describes DNA digestion that has not gone to completion. Complete digestion would mean that all accessible target sites were cleaved under the reaction conditions. Photosynthesis, translation, and osmosis are unrelated biological processes and cannot name the incomplete cleavage of DNA by a restriction enzyme.