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Photosynthesis

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  1. As compared to a C3 – plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by C4 plants :
    1. two
    2. six
    3. twelve
    4. zero
Correct Option: C

Equation for C4 pathway is :
6 PEP + 6 RuBP + 6CO2 + 30 ATP + 12 NADPH + 6PEP + 6 RuBP + C6H12O6 + 30 ADP + 30 H3PO4 + 12 NADP +
The net reaction of C3 dark fixation is 6RuBP + 6CO2 + 18ATP + 12 NADPH 6 RuBP + C6H12O6 + 18 ADP + 18 P + 12 NADP +


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