Some photosynthetic organisms contain chloroplasts that lack photosystem II yet are able to survive. The best way to detect the "lack of photosystem II" in these organisms would be:

Explanation

Photosytem II is involved in the photolysis of water (as a result oxygen is evolved) If photosystem II is absent in organism, oxygen will not be liberated.Photosynthesis has two types of reactions: initial light-dependent reactions and late light-independent reactions. The photosystem II (PSII) is the first protein complex responsible for the initial light-dependent reactions. This photosystem captures sunlight to catalyze the generation of an electrochemical transmembrane proton (H+) gradient, which is subsequently used to synthesize ATP. Photosystem II produces molecular oxygen (O2) by oxidizing two molecules of water (H2O) into one molecule of oxygen. In conclusion, the statement 'the best way to detect the lack of photosystem II in these organisms would be to test for the liberation of O2 in the light' is TRUE.