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Respiration occurs extensively in the mitochondria of eukaryotic Cells. Mitochondrial organelles are found more in muscles and other tissues that require a more than usual supply of Energy.
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∙ 12y ago
Brandy Cloths
C4 plants
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What is photorespiration?
Photorespiration occurs when a plant runs out of CO2 and begins adding O2 to RuBP in the Calvin cycle.
In which cell would you expect photorespiration?
in the chloroplast
Why C4 plants able to photosynthesize with no apparent photorespiration?
the use PEP carboxylase to initially fix CO2
What is the name of the process wherein co2 is released without the production of atp or nadph?
Photorespiration
What is the difference between photorespiration and respiration?
photorespiration: RuBP accepts oxygen instead of CO2 during photosynthesis because production of oxygen has exceeded production of CO2. respiration: Oxygen is produced in oxidative phosphorylation/chemisosmosis and used to produce water during respiration.
What is photorespiration?
Photorespiration occurs when a plant runs out of CO2 and begins adding O2 to RuBP in the Calvin cycle.
Is photorespiration independent of light intensity?
Photorespiration occurs in dry situations, where there is intense light. Desert plants are a great example. Therefore, no, photorespiration is not independent of light intensity.
Does photorespiration produce energy?
No, photorespiration actually wastes energy because no useful product is created when photorespiration occurs, and, as a result, the energy absorb from light earlier is wasted.
Can tomato plants show photo respiration?
No, tomato plants do not undergo photorespiration. Photorespiration is a process that occurs in C3 plants, where oxygen is mistakenly used instead of carbon dioxide in the initial steps of photosynthesis. However, tomato plants are classified as C4 plants, which have evolved mechanisms to minimize photorespiration.
What happens during photorespiration?
In photorespiration, O2 replaces CO2 in a non-productive, wasteful reaction. Photorespiration occurs when the CO2 levels inside a leaf become low, which happens on hot dry days when a plant is forced to close its stomata to prevent excess water loss.
Why is photorespiration wastful process?
photorespiration protects plant from photooxidation and photoinhibition.
Where is Photorespiration located?
Photorespiration involves three different organelles--- chloroplasts, peroxisomes and mitochondria
What is photorespiration and Explain how some species of plants cope with this condition C4 and CAM?
Photorespiration is a process of metabolic pathway that consumes oxygen, releases carbon dioxide, generates no ATP, and decreases photosynthetic output; generally occurs on hot, dry, bright days, when stomata close and the oxygen concentration in the leaf exceeds that of carbon dioxide. Photorespiration occurs because Rubisco can utilize O2 as a substrate instead of CO2. It means when stomata partially close on hot day, dry day, CO2 levels drop as CO­2 is consumed in the Calvin cycle. At the same time, O2 levels rise as the light reaction converts light to chemical energy. When the O­­2:CO2 ratio increase, there is not enough CO­2 and rubisco can add O2 to Calvin cycle (RuBP). Therefore, photorespiration consumes O2 and organic fuel and releases CO2 without producing ATP or sugar. Photorespiration reduces net C fixation considerably. Photorespiration also uses ATP & NADPH. Photorespiration is a process of metabolic pathway that consumes oxygen, releases carbon dioxide, generates no ATP, and decreases photosynthetic output; generally occurs on hot, dry, bright days, when stomata close and the oxygen concentration in the leaf exceeds that of carbon dioxide. Photorespiration occurs because Rubisco can utilize O2 as a substrate instead of CO2. It means when stomata partially close on hot day, dry day, CO2 levels drop as CO­2 is consumed in the Calvin cycle. At the same time, O2 levels rise as the light reaction converts light to chemical energy. When the O­­2:CO2 ratio increase, there is not enough CO­2 and rubisco can add O2 to Calvin cycle (RuBP). Therefore, photorespiration consumes O2 and organic fuel and releases CO2 without producing ATP or sugar. Photorespiration reduces net C fixation considerably. Photorespiration also uses ATP & NADPH.
Do plants need light to respire?
No, in fact most respiration plants perform occurs at night. There is a form with sunlight, called photorespiration, but its performed rarely as photosynthesis is more common.
Why is photorespiration such a waste?
Photorespiration is a wasteful process because: i. About 25 % of the CO2 fixed during photosynthesis is lost ii. There is no formation of ATP & NADH
Does radiation occur mainly through liquids?
No, radiation occurs mainly between gases!
Why doesn't photorespiration occur in chemoautotrophs?
Photorespiration doesn't happen because of this spatial separation. Chemoautotrophs are found in the deep sea. Autotrophs make their own food.
