diff b/w C3 and C4 plant ?
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Photorespiration is present in C3 plants which make them less efficient than C4 plants. Photorespiration is absent in C4 plants which make them more useful for the plants.
Due to photorespiration, no ATP or NADPH is synthesised in C3 plant. Hence, it is a useless mechanism. But C4 plants produce more ATP and NADPH due to the absence of Photorespiration.
C3 plants produce less CO2 and uses more O2. But C4 plants produce the same amount of CO2 for less than half O2 used by C3 plants.
First stable product in C3 cycle is Phosphoglyceric Acid (PGA). First stable product in C4 cycle is Oxaloacetic Acid (OAA).
RuBP is the CO2 acceptor in the C3 cycle. PEP is the CO2 acceptor in the C4 cycle.
Due to photorespiration, no ATP or NADPH is synthesised in C3 plant. Hence, it is a useless mechanism. But C4 plants produce more ATP and NADPH due to the absence of Photorespiration.
C3 plants produce less CO2 and uses more O2. But C4 plants produce the same amount of CO2 for less than half O2 used by C3 plants.
First stable product in C3 cycle is Phosphoglyceric Acid (PGA). First stable product in C4 cycle is Oxaloacetic Acid (OAA).
RuBP is the CO2 acceptor in the C3 cycle. PEP is the CO2 acceptor in the C4 cycle.
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Photosynthesis then continues in much the same way as C3 plants. This type of photosynthesis in highly efficient and little fixed CO2 is lost through photorespiration.C4 plants are more efficient at gathering carbon dioxide and utilizing nitrogen from the atmosphere and in the soil.
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