Q.

As compound to a C_3-plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by C_4-plants
 a) 2        b) 6        c) 0        d) 12

1 A
2 B
3 C
4 D

Ans.

(d) 12 extra ATP molecules are needed for production of one molecule of one molecule of hexose sugar in C_4-plant.