Photorespiration is a wasteful pathway that competes with the Calvin cycle. It begins when rubisco acts on oxygen instead of carbon dioxide. Photorespiration can occur when carbon dioxide levels are low, for example, when the stomata are closed to prevent water loss during drought. The plant continues fix CO2 when its stomata are closed, the CO2 will get used up and the O2 ratio in the leaf will increase relative to CO2 concentrations. These questions will build your knowledge and your own create quiz will build yours and others people knowledge. PROCESS OF PHOTORESPIRATION: In this process Ribulose bi phosphate (RuBP) is oxygenated in the presence of atmospheric oxygen and forms 2 carbon molecule containing phosphoglycolate and 3 carbon molecule containing phosphoglyceric acid (PGA). Practice: Photorespiration Video transcript - [Voiceover] We have other videos that go into some depth on the Calvin cycle, and we'll refer to that in this video as the normal Calvin cycle, and the focus of this video is really a quirk that diverts us from the normal Calvin cycle, and it's a quirk due to this enzyme right here whose shorthand name is rubisco. C 3 Plants. Photorespiration is influenced by high temperature as well as light intensity and accelerating the formation of glycolate and the flow through the photorespiratory pathway. τ1) through its consumption of ATP and NADPH thus preventing the over-reduction of the PQ pool when leaf intercellular CO2 concentrations ar… What molecules does photorespiration result in? c. generates a proton gradient. Photorespiration results in the light-dependent uptake of oxygen and release of carbon dioxide and is associated with the synthesis and metabolism of a small molecule called glycolate. Photorespiration. B. Photorespiration occurs when a plant runs out of CO2 and uses O2 to create sugar in the Calvin cycle. C4 photosynthesis. And that's why some of the plants that we associate with being very strong sugar, or even ethanol producers, all perform C-4 photosynthesis. It looks like your browser needs an update. Now that's a very efficient way of producing sugars. Diagrams. Photorespiration a. results in CO 2 fixation. 2 Carbon Compound which is broken Down by Peroxisomes, two types of plants that adapted to photorespiration and have different leaf analotomys, tropical plants, sugar cane, corn, grass family, mesophyll cells, bundle sheath cell and vein, C4 requires ____ ATP more to make another G3P, CAM plants run cycles at the same place but, CAM plants turn CO2 to ___________ _________ at night, CAM plants turn Organic Acid to CO2 in the morning to. Photorespiration occurs when rubisco reacts RuBP with, O₂ instead of Co2 which slows the Calvin Cycle, consumes ATP, and results in a release of Carbon. d. results in the synthesis of glucose. Photorespiration can be defined as the evolution of CO 2 during photosynthesis. Photorespiration. A. Photorespiration occurs when a plant needs the energy carriers from the light reactions immediately and bypasses the Calvin cycle. Photorespiration occurs when the CO2 levels inside a leaf become low. Photorespiration causes a light-reliant acceptance of O2 and discharge of CO2 and is related to the creation and metabolism of a minute particle named glycolate. Here it occurs in three organelles with coordination- Chloroplast, Peroxisomes & Mitochondria. This is also known as the oxidative photosynthetic, or C 2 photosynthesis or carbon cycle. Start studying Photorespiration. Photorespiration. 5 suggests that there is a theoretical advantage of eliminating photorespiration on canopy carbon gain, despite a higher minimum photon requirement per CO 2 assimilated, even at … Mobile. Photorespiration 2. To ensure the best experience, please update your browser.