Process of Photosynthesis Essay -- essays research papers

Photosynthesis is the surgical procedure by which organisms that contain the pigment chlorophyll convert light capacity into chemical substance energy which can be stored in the molecular bonds of natural motes. Photosynthesis powers almost all trophic chains and food webs on the Earth. The profits process of photosynthesis is described by the following equation 6CO2 + 6H2O + Light readiness = C6H12O6 + 6O2 This equation simply inwardness that carbon dioxide from the air and water coalesce in the presence of sunlight to form sugars, oxygen is released as a by-product of this reaction. Photosynthesis begins when light strikes Photosystem I pigments and excites their electrons. The energy passes rapidly from scrap to molecule until it reaches a special chlorophyll molecule called P700, so named because it absorbs light in the red region of the spectrum at wavelengths of 700 nanometers. Until this point, only energy has moved from molecule to molecule, now electrons themselves t ransfer between molecules. P700 uses the energy of the excited electrons to boost its give birth electrons to an energy level that enables an adjoining electron acceptor molecule to capture them. The electrons be then passed down a chain of bearer molecules, called an electron send out chain. The electrons are passed from one carrier molecule to another in a downhill direction, like individuals in a bucket brigade fleeting water from the top of a hill to the bottom. Each electron carrier is at a lower energy level than the one forwards it, and the result is that electrons release energy as they move down the chain. At the end of the electron transport chain lies the molecule nicotine adenine dinucleotide (NADP+). employ the energy released by the flow of electrons, two electr... ...he molecular bonds that are broken. Glucose C6H12O6 breathing is the opposite of photosynthesis, and is described by the equation C6H12O6+6O2 ---------- 6CO2+6H2O+36ATP Simply stated, this equati on means that oxygen combines with sugars to break molecular bonds, releasing the energy (in the form of ATP) contained in those bonds. In addition to the energy released, the products of the reaction are carbon dioxide and water. In eukaryotic cells, cellular respiration begins with the products of glycolysis being transported into the mitochondria. A series of metabolous pathways (the Krebs cycle and others) in the mitochondria result in the further breaking of chemical bonds and the liberation of ATP. CO2 and H2O are end products of these reactions. The theoretical maximum yield of cellular respiration is 36 ATP per molecule of glucose metabolized.