At a fundamental level, water provides electrons to replace those removed from chlorophyll in photosystem II. Also, water produces oxygen as well as reduces NADP to NADPH (required in the Calvin cycle) by liberating H+ ions
During the process of photosynthesis, six molecules of carbon dioxide and six molecules of water react in the presence of sunlight to form one glucose molecule and six molecules of oxygen. The role of water is to release oxygen (O) from the water molecule into the atmosphere in the form of oxygen gas (O2).
Water also has another important role of being an electron feeder. In the process of photosynthesis, water provides the electron that binds the hydrogen atom (of a water molecule) to the carbon (of carbon dioxide) to give sugar (glucose).
Water acts as a reducing agent by providing H+ ions that convert NADP to NADPH. Since NADPH is an important reducing agent present in chloroplasts, its production results in a deficit of electrons, resulting from oxidation of chlorophyll. This loss of electron must be fulfilled by electrons from some other reducing agent. Photosystem II involves the first few steps of the Z-scheme (the diagram of the electron transport chain in photosynthesis) and therefore a reducing agent that can donate electrons is required to oxidize chlorophyll, which is provided by water (acting as a source of electrons in green plants and cynobacteria). Hydrogen ions thus released create a chemical potential (chemiosmotic) across the membrane that finally results in synthesis of ATP. Photosystem II is the primary known enzyme that acts as catalyst in this oxidation of water.
The similarities between Greek and Roman government were that both favored aristocratic rule, both believed that their citizens should have a right to participate in politics and military service and they both governments were made up of several city states.
The differences were that the Greek government did not have political parties. If a Roman official was unwanted in office, the citizens would vote him off and just be glad that he wasn't governing them anymore, but if a Greek official was unwanted he'd be kicked off, ostracized, and banned from Athens for 10 years. Also, the Romans didn't allow women to vote, but women of upper class citizenship could influence their husband's vote.
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Answer: "If a miracle happened and your shopping compulsion was overnight, how would you know it was solved, and what would be different?"
Explanation:
Being a solution-oriented therapist, asking this question will prompt her client to think deeply about what might bring an end to his addiction. While the second question looks into the effects and the last question traces the origin of the addiction, the first question quoted about seeks to find a lasting solution.
