In the 1950\'s Robert Emerson conducted an experiment in which he yield as a fun
ID: 261526 • Letter: I
Question
In the 1950's Robert Emerson conducted an experiment in which he yield as a function of flash energy in the green alga Chlorella vulgaris. The results are shown in the graph below. Based on this experiment, which of the following conclusions 9. measured oxygen can be drawn? .Maximum yield 1O,/2500 chlorophyll molecuies initial slope quantum yield 1 02/9-10 absorbed quanta Low intensity » High intensity Flash energy (number of photons) PLANT PHYSIOLOGY, Se, Figure 7.1 a. The oxidation of water to O2 involves a minimum of 9 electrons b. Two photosystems operate in series to oxidize water to O2. c. Most of the chlorophyll in a cell is not involved in photosynthesis. d. All of the above.Explanation / Answer
Answer: option B is correct.
Explanation:
From the given graph, we can observe that there two kinds of slopes in the graph line.
The initial graph line shows a steep slope. This occurs at the low light intensity.
The later graph line shows almost plateau shape. This occurs at the high light intensity.
Based on these results, emerson proposed that there are two reaction centers involved in photosynthesis which work at different light intensities.
The oxygen output is greater when both light intensities are present than the sum of individula light intensities.
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