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:
Make a raft and get off the island
Explanation:
Answer:
George Washington.
Explanation:
George Washington, the Continental Army general & leader, was elected as the first president of the United States almost unanimously by the People of the United States.
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Answer: Mary's observation is an example of TOP - DOWN processing
Explanation:
Top - down processing has to do with the way our brains utilize information that has been inputted into the brain by the sensory systems. It is a cognitive - driven procedure that commences with thoughts that move down to lower - level functions.
Top down processing occurs when humans' perceptions are formed beginning with a bigger idea before moving towards more elaborate and detailed information.
It (top - down processing) is generally concerned with the use and application of previous knowledge in taking decisions and drawing conclusions.
In bottom - up processing, the analysis of all individual characters is involved so it cannot be the answer that is being sought after.
Principles of simplicity and proximity refer to the manner of grouping of objects and are not applicable to understanding the sign.
Mary utilized her previously acquired knowledge of the arrangement of letters in order to successfully read the sign and this is exactly how TOP - DOWN processing operates
<em>Answer:</em> I most likely think the answer is <em><u>"Many rural Georgians were farmers and had struggled economically for years."</u></em>
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<em><u>-iSqloEdits</u></em>