as compared to c3 plants how many additional molecules of ATP are required for production of hexose sugar in c4 plants?
If C3 plants requires 18 ATP molecules for the synthesis of 1 molecule of hexose sugar while C4 plants will be needing 30 ATP molecules for the same. Thus, C4 -plants requires 12 extra ATP molecules than C3 -plants for the synthesis of 1 molecule of hexose sugar.