Botany - Photosynthesis in Higher Plants Question with Solution | TestHub

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.