As compared to a $\mathrm{C}_3$-plant, how many additional molecules of ATP are needed for net production of…
As compared to a $\mathrm{C}_3$-plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by $\mathrm{C}_4$-plants?
two
$\operatorname{six}$
twelve
zero.
Solution
18 ATP molecules are required by $\mathrm{C}_3$ plants for the synthesis of one molecule of hexose sugar while 30 ATP molecules are needed by the $\mathrm{C}_4$ plants for the same. Thus, $\mathrm{C}_4$ plants have a need of 12 ATP molecules extra than $\mathrm{C}_3$ plants for the synthesis of one molecule of hexose sugar.