I need help on electron transport chain, cellular respiration?

Question

I got this from the textbook.
"The spinning rod of the ATP Synthase brings about conformational change in the knob, activating sites where ADP and inorganic phospate combine to make ATP."
1. My question is where on earth does ADP and inorganic phosphate come from?

I also got this from the textbook.the last cytochrome of the chain, cyt a, passes it electrons to oxygen, which also picks up a pair of hydrogen ions from the aqueous solution to form water."
2. why is it necessary to have water form? what does water do? what happends after water forms and where does it go?

Answer 1

ADP is synthesized inside cell from adenine base and two inorganic phosphate present in cell .Inorganic phosphate is obtained from food which we eat, and in food it comes from soil.
adenine is synthesized in cell from various basics element


water is formed because the two hydrogen atoms which have initially given there electron to photo system II are now accepting the O-- to form water .Water forms is utilized various other reaction where it is utilized as solvent, some water is transpired
some is stored in various part of plant

Answer 2

An electron shipping chain couples a chemical reaction between an electron donor (inclusive of NADH) and an electron acceptor (inclusive of O2) to the move of H+ ions throughout the time of a membrane, through a series of mediating biochemical reactions. those H+ ions are used to furnish adenosine triphosphate (ATP), the important power intermediate in living organisms, as they flow again throughout the membrane. Electron shipping chains are used for extracting power from image voltaic (photosynthesis) and from redox reactions inclusive of the burning of sugars (respiration). In chloroplasts, gentle drives the conversion of water to oxygen and NADP+ to NADPH and a move of H+ ions. NADPH is used as an electron donor for carbon fixation. In mitochondria, that is the conversion of oxygen to water, NADH to NAD+ and succinate to fumarate that drives the move of H+ ions. at the same time as some bacteria have electron shipping chains equivalent to those in chloroplasts or mitochondria, different bacteria use diverse electron donors and acceptors. both the respiration and photosynthetic electron shipping chains are important web pages of premature electron leakage to oxygen, for this reason being important web pages of superoxide production and drivers of oxidative stress. the answer is mitchodria.