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During photorespiration under low CO2 and high O2 levels, O2 reacts with ribulose 1,5- bisphosphate to yield
- a)One molecule each of 3-phosphoglycerate and 2-phosphoglycolate
- b)Two molecules of 3-phosphoglycerate
- c)Two molecules of 2-phosphoglycolate
- d)One molecule each of 3-phosphoglycerate and glyoxylate
Correct answer is option 'A'. Can you explain this answer?
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During photorespiration under low CO2 and high O2 levels, O2 reacts wi...
During photo respiration under low CO2 and high O2 reacts with ribulose – 1, 5 bisphosphate to yield- one molecule each of 3-phosphoglycerate and 2- phosphoglycolate.
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During photorespiration under low CO2 and high O2 levels, O2 reacts wi...
Photorespiration and its process:
Photorespiration is a metabolic pathway that occurs in plants, particularly in the chloroplasts of the leaves. It is a side reaction to the primary process of photosynthesis and involves the uptake of oxygen (O2) and release of carbon dioxide (CO2). This process occurs under conditions of low CO2 and high O2 levels, which can happen when the stomata (pores on the leaf surface) close to prevent water loss.
Reaction of O2 with ribulose 1,5-bisphosphate:
During photorespiration, one of the key reactions involves the oxidation of ribulose 1,5-bisphosphate (RuBP) by O2. This reaction is catalyzed by the enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco). Rubisco normally functions as a carboxylase, adding CO2 to RuBP to initiate the Calvin cycle, which is the primary pathway of carbon fixation during photosynthesis. However, under conditions of low CO2 and high O2, Rubisco acts as an oxygenase, leading to the production of 3-phosphoglycerate (3-PGA) and 2-phosphoglycolate.
Products of the reaction:
The reaction of O2 with RuBP yields one molecule each of 3-phosphoglycerate (3-PGA) and 2-phosphoglycolate. Let's break down the reaction:
1. O2 reacts with RuBP to form one molecule of 3-PGA.
2. Simultaneously, a two-carbon compound called 2-phosphoglycolate is also formed.
Therefore, the correct answer is option 'A': One molecule each of 3-phosphoglycerate and 2-phosphoglycolate.
Significance of the products:
The production of 3-PGA is important because it can re-enter the Calvin cycle and continue the process of carbon fixation, ultimately producing glucose and other carbohydrates. On the other hand, 2-phosphoglycolate is a toxic compound that needs to be detoxified by a series of reactions known as the photorespiratory pathway. This pathway involves the conversion of 2-phosphoglycolate into glyoxylate, which is then transformed into glycine and serine. These amino acids can be used for various metabolic processes within the plant.
In conclusion, during photorespiration under low CO2 and high O2 levels, O2 reacts with ribulose 1,5-bisphosphate to yield one molecule each of 3-phosphoglycerate and 2-phosphoglycolate. This reaction helps plants adapt to unfavorable environmental conditions and maintain metabolic balance.
Photorespiration is a metabolic pathway that occurs in plants, particularly in the chloroplasts of the leaves. It is a side reaction to the primary process of photosynthesis and involves the uptake of oxygen (O2) and release of carbon dioxide (CO2). This process occurs under conditions of low CO2 and high O2 levels, which can happen when the stomata (pores on the leaf surface) close to prevent water loss.
Reaction of O2 with ribulose 1,5-bisphosphate:
During photorespiration, one of the key reactions involves the oxidation of ribulose 1,5-bisphosphate (RuBP) by O2. This reaction is catalyzed by the enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco). Rubisco normally functions as a carboxylase, adding CO2 to RuBP to initiate the Calvin cycle, which is the primary pathway of carbon fixation during photosynthesis. However, under conditions of low CO2 and high O2, Rubisco acts as an oxygenase, leading to the production of 3-phosphoglycerate (3-PGA) and 2-phosphoglycolate.
Products of the reaction:
The reaction of O2 with RuBP yields one molecule each of 3-phosphoglycerate (3-PGA) and 2-phosphoglycolate. Let's break down the reaction:
1. O2 reacts with RuBP to form one molecule of 3-PGA.
2. Simultaneously, a two-carbon compound called 2-phosphoglycolate is also formed.
Therefore, the correct answer is option 'A': One molecule each of 3-phosphoglycerate and 2-phosphoglycolate.
Significance of the products:
The production of 3-PGA is important because it can re-enter the Calvin cycle and continue the process of carbon fixation, ultimately producing glucose and other carbohydrates. On the other hand, 2-phosphoglycolate is a toxic compound that needs to be detoxified by a series of reactions known as the photorespiratory pathway. This pathway involves the conversion of 2-phosphoglycolate into glyoxylate, which is then transformed into glycine and serine. These amino acids can be used for various metabolic processes within the plant.
In conclusion, during photorespiration under low CO2 and high O2 levels, O2 reacts with ribulose 1,5-bisphosphate to yield one molecule each of 3-phosphoglycerate and 2-phosphoglycolate. This reaction helps plants adapt to unfavorable environmental conditions and maintain metabolic balance.
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During photorespiration under low CO2 and high O2 levels, O2 reacts with ribulose 1,5- bisphosphate to yielda)One molecule each of 3-phosphoglycerate and 2-phosphoglycolateb)Two molecules of 3-phosphoglyceratec)Two molecules of 2-phosphoglycolated)One molecule each of 3-phosphoglycerate and glyoxylateCorrect answer is option 'A'. Can you explain this answer?
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During photorespiration under low CO2 and high O2 levels, O2 reacts with ribulose 1,5- bisphosphate to yielda)One molecule each of 3-phosphoglycerate and 2-phosphoglycolateb)Two molecules of 3-phosphoglyceratec)Two molecules of 2-phosphoglycolated)One molecule each of 3-phosphoglycerate and glyoxylateCorrect answer is option 'A'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about During photorespiration under low CO2 and high O2 levels, O2 reacts with ribulose 1,5- bisphosphate to yielda)One molecule each of 3-phosphoglycerate and 2-phosphoglycolateb)Two molecules of 3-phosphoglyceratec)Two molecules of 2-phosphoglycolated)One molecule each of 3-phosphoglycerate and glyoxylateCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for During photorespiration under low CO2 and high O2 levels, O2 reacts with ribulose 1,5- bisphosphate to yielda)One molecule each of 3-phosphoglycerate and 2-phosphoglycolateb)Two molecules of 3-phosphoglyceratec)Two molecules of 2-phosphoglycolated)One molecule each of 3-phosphoglycerate and glyoxylateCorrect answer is option 'A'. Can you explain this answer?.
During photorespiration under low CO2 and high O2 levels, O2 reacts with ribulose 1,5- bisphosphate to yielda)One molecule each of 3-phosphoglycerate and 2-phosphoglycolateb)Two molecules of 3-phosphoglyceratec)Two molecules of 2-phosphoglycolated)One molecule each of 3-phosphoglycerate and glyoxylateCorrect answer is option 'A'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about During photorespiration under low CO2 and high O2 levels, O2 reacts with ribulose 1,5- bisphosphate to yielda)One molecule each of 3-phosphoglycerate and 2-phosphoglycolateb)Two molecules of 3-phosphoglyceratec)Two molecules of 2-phosphoglycolated)One molecule each of 3-phosphoglycerate and glyoxylateCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for During photorespiration under low CO2 and high O2 levels, O2 reacts with ribulose 1,5- bisphosphate to yielda)One molecule each of 3-phosphoglycerate and 2-phosphoglycolateb)Two molecules of 3-phosphoglyceratec)Two molecules of 2-phosphoglycolated)One molecule each of 3-phosphoglycerate and glyoxylateCorrect answer is option 'A'. Can you explain this answer?.
Solutions for During photorespiration under low CO2 and high O2 levels, O2 reacts with ribulose 1,5- bisphosphate to yielda)One molecule each of 3-phosphoglycerate and 2-phosphoglycolateb)Two molecules of 3-phosphoglyceratec)Two molecules of 2-phosphoglycolated)One molecule each of 3-phosphoglycerate and glyoxylateCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for GATE.
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During photorespiration under low CO2 and high O2 levels, O2 reacts with ribulose 1,5- bisphosphate to yielda)One molecule each of 3-phosphoglycerate and 2-phosphoglycolateb)Two molecules of 3-phosphoglyceratec)Two molecules of 2-phosphoglycolated)One molecule each of 3-phosphoglycerate and glyoxylateCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for During photorespiration under low CO2 and high O2 levels, O2 reacts with ribulose 1,5- bisphosphate to yielda)One molecule each of 3-phosphoglycerate and 2-phosphoglycolateb)Two molecules of 3-phosphoglyceratec)Two molecules of 2-phosphoglycolated)One molecule each of 3-phosphoglycerate and glyoxylateCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of During photorespiration under low CO2 and high O2 levels, O2 reacts with ribulose 1,5- bisphosphate to yielda)One molecule each of 3-phosphoglycerate and 2-phosphoglycolateb)Two molecules of 3-phosphoglyceratec)Two molecules of 2-phosphoglycolated)One molecule each of 3-phosphoglycerate and glyoxylateCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
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