Question

ATP molecules required to synthesise one molecule of glucose by $C_4$ pathway are

• A. 12
• B. 18
• C. 24
• D. 30

Answer 1

The correct option is D 30

In C4 plants:

For 1 CO2 molecule: 5 ATPs + 2 NADPH molecules are required

For 3 CO2 molecules (that is 1 triose phosphate): 15 ATPs + 6 NADPH molecules are required

For 6 CO2 molecules (that is 1 glucose): 30 ATPs + 12 NADPH molecules are required.

So, the correct option is '30'.