38
Question
C2 cycle is studied in
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Solution
The correct option is B Those showing photorespiration
Otto Warburg discovered that O2 inhibits photosynthesis in C3 plants. This phenomenon originally was known as the Warburg effect, but later it was recognized as the light-dependent release of CO2 due to oxygenase activity of RuBisCO which is a bifunctional enzyme because it can catalyze both the carboxylation and the oxygenation of RuBP. When there is low CO2 concentration, RuBisCO performs oxygenase activity. Oxygenation of RuBP produces one molecule of 3-phosphoglycerate and one of 2-phosphoglycolate.2-phosphoglycolate produced by RuBisCO when it oxygenates RuBP can't be utilized within the Calvin cycle. The pathway by which 2-phosphoglycolate is further metabolized is called as glycolate pathway or C2 cycle or oxidative photosynthetic carbon cycle or simply photorespiration. This pathway involves three subcellular compartments, the chloroplasts, peroxisomes and mitochondria.So, the correct answer is B.
Otto Warburg discovered that O2 inhibits photosynthesis in C3 plants. This phenomenon originally was known as the Warburg effect, but later it was recognized as the light-dependent release of CO2 due to oxygenase activity of RuBisCO which is a bifunctional enzyme because it can catalyze both the carboxylation and the oxygenation of RuBP. When there is low CO2 concentration, RuBisCO performs oxygenase activity. Oxygenation of RuBP produces one molecule of 3-phosphoglycerate and one of 2-phosphoglycolate.
2-phosphoglycolate produced by RuBisCO when it oxygenates RuBP can't be utilized within the Calvin cycle. The pathway by which 2-phosphoglycolate is further metabolized is called as glycolate pathway or C2 cycle or oxidative photosynthetic carbon cycle or simply photorespiration. This pathway involves three subcellular compartments, the chloroplasts, peroxisomes and mitochondria.
So, the correct answer is B.
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