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NEET Biology question

BiologyPhotosynthesis in Higher PlantsNEET

PEP carboxylase I. is involved in at least some CO2 fixation in both C3 and C4-plants II. catalyses the reaction of fixing CO2 into pyruvic acid in bundle sheath cells III. is capable of fixing CO2 more efficiently at lower atmospheric CO2 concentration than RuBP carboxylase

Answer: (D)

Solution

PEP carboxylase fixes CO2 into oxaloacetic acid (not pyruvic acid) and does so in mesophyll cells (not bundle sheath cells), so statement II is incorrect. PEP carboxylase does have a much higher affinity for CO2/HCO3- than RuBisCO does for

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Question ID VK-128391