What is a pumhole?

Answer 1

Photosysthesis starts with light (more accurately, light-dependent) reactions to convert light energy into chemical energy, followed by dark (more accurately, light-independent) reactions to fix carbon and generate bio-molecules for metabolism. Photosynthesis is the process by which green plants harness light energy from the sun to convert it to the chemical energy of sugar. Photosynthesis is a process wherein it produces ATP(adenosine triphosphate) from ADP(adenosine diphosphate) and Pi (Inoraganic Phosphate) by using the energy from light to excite electrons that are passed along an electron transport chain. Coupled with the transfer of electrons is the pumping of hydrogen ions and the splitting of water molecules. The process is into two phases: Light dependent phase or photochemical reaction that occurs in the granum and requires the presence of light energy it involves three major events: a. Chlorophyll photoactivation is the capture of light energy by chlorophyll that results in the release of energized elctrons. b. Photolysis is the splitting of water molecules into hydrogen ions, elcetrons and oxygen gas in the presence of light activated chlorophyll. c. Photophosphorylation is the transfer of light energy absorbed by chlorophyll to molecules of ATP, the energy currency of the cell. The following are produced during the light phase: 1. Oxygen gas..from water and released as a gaseous by-product of photosynthesis. 2. NADPH... a hyrogen iom from water and two electrons from chlorophyll 3. ATP...ADP and Pi combined in the presence of energy harnessed by chlorophyll from the sun. Light independent phase involves the use of NADPH and ATP for the conversion of carbon dioxide into carbohydrates...please refer to the Calvin Cycle Photosynthesis ends with the formation of a simple sugar, glucose. Four thingd may happen to this glucose: A. It may be converted to sucrose and transported from the leaves to other parts of the plant. B. It may be converted to starch and stored for future use of the plant. C. It may be utilized to provide the raw materials from which other organic substances needed by the plantmay be synthesized. D. It may be utilized for cellular respiration. .....................................................................END............................................................... GEO KRISTOFF T. MARCOS