Question

How many molecules of carbon dioxide are required to produce a 6-carbon sugar?

Answer 1

24 molecules

Step-by-step explanation:

All the carbon in the sugar comes from CO2. 6 molecules of CO2 need to be fixed to form 1 molecule of glucose (a 6 carbon sugar). So 24 molecules of CO2 should enter the calvin cycle to produce a sugar that has 24 carbon atoms.