02 Directions: Questions 5 and 6 refer to the set-up below, which is used to investigate the photosynthesis of a waterweed: 5. I doubt very much if there is any 'recycling' of water in PS. A) splitting water molecules B) chemiosmosis C) the electron transfer system of photosystem I D) the electron transfer system of photosystem II 01 The oxygen produced during photosynthesis comes from. The (complete) reduction of one CO(2) to 1 CH(4) requires 4 reducing equivalents (8 electrons) and two oxygen atoms are 'lost' as water. CO2 has to be captured for photosynthesis and needs to be converted to sugars along with water. About photosynthesis, you should always remember - that means never forget - that the oxygen molecules produced (the ones that we have to breathe) ALWAYS come from the splitting of water, in CO2 + H2O - the light-dependent reactions of photosynthesis. 6 molecules of water will produce 3 molecules of O2 (6 oxygen atoms---->3 molecules of O2), but a total of 6 O2 molecules are produced. $\endgroup$ – user1136 Oct 13 '18 at 14:55 Considering the overall equation for photosynthesis 6H2O+6CO2----->C6H12O6+6O2 I understand that in the light reactions, water is split into H+, e-, and O. The excess oxygen is released into the atmosphere during the respiration cycle. If there’s sufficient CO2 and little oxygen, this runs perfectly. Photosynthesis can be divided into two stages—the light dependent reaction and the light independent (or dark) reactions. The water molecules are split into hydrogen and oxygen, and the hydrogen joins carbon dioxide to create sugars. Cornelius van Niel experimentally proved for the first time that the oxygen liberated during photosynthesis comes from water and not from carbon dioxide. the source of oxygen produced during photosynthesis is: a. carbon dioxide b. water c. air b electrons that have been excited by light energy absorbed by a chlorophyll molecule: a. attach to 2 protons and an oxygen atom to form a water molecule b. jump to molecules in the membrane of a thylakoid c. are absorbed to the interior of a thylakoid $\begingroup$ All of the oxygen evolved in PS comes from water, and none comes from CO(2). The waterweed produces gas X and starch from. Oxygen liberated during photosynthesis comes from the splitting or hydrolysis of water in the green plants. The oxygen atoms are released back into the air. Photolysis is defined as the splitting of H2O molecule into hydrogen ions, electrons and oxygen in the presence of light and grana. NONE of the oxygen (O2) that is produced comes from the CO2. During the light reactions, an electron is stripped from a water molecule freeing the oxygen and hydrogen atoms. B. glucose. During photosynthesis, plants take in carbon dioxide and water, disassemble the molecules and convert them into sugar and oxygen. C. chlorophyll. Gas X Starch. Every water molecule is made of two hydrogen atoms and one oxygen atom, but only the hydrogen atoms are required. The other 3 O2 molecules must come from CO2, right? Photolysis of water is the main source of oxygen released during photosynthesis. The free oxygen atom combines with another free oxygen atom to produce oxygen gas which is then released. A. water carbon dioxide The oxygen released by photosynthesis comes from the water a plant absorbs. A. water. … The oxygen released by photosynthesis is produced by which of the following processes? D. carbon dioxide. 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