As compared to a `C_(3)` plant, how many additional molecules of ATP are needed for net production of one molecule hexose sugar by `C_(4)` plants

Options

A. Two
B. Six
C. Zero
D. Twelve

Answer

D

Explanation

`C_4` cycle is more energy expensive and requires 30
ATP for the synthesis of one molecule of glucose.
`C_3` the cycle is less energy expensive and requires only 18 ATP for the synthesis of one molecule of glucose.