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.
Answer:
An optimistic person would be stable.
Explanation:
an optimistic person is always sure about his or her success.
Some counties have been merged meaning you have a city with
a municipality and a county that acts as an extension of the state that
characteristics of both which called consolidated city counties. Then you have the county equivalents where there
are no counties but there are city type governments that exist or independent cities with no counties while
some are outside the jurisdiction of counties.
Collectivism is the correct answer.
Displays of polite humility is very common among those who value collectivism. In a collectivist culture, such as Brazil, Japan and India, the emphasis is on the needs and goals of the group as a whole and not on the individual alone. Differently from what is usually seen in individualistic cultures, people from collectivist cultures are very supportive, humble, and afraid of being rejected.
