Question

how many turns of the calvin cycle are needed to make one glucose molecule? multiple choice 1 3 4 6

Explanation:

In the Calvin cycle, each turn fixes one molecule of carbon dioxide ($CO_2$). A glucose molecule ($C_6H_{12}O_6$) has 6 carbon atoms. So, to get 6 carbon atoms (for one glucose), the Calvin cycle needs to turn 6 times (since each turn fixes 1 $CO_2$ molecule, and 6 $CO_2$ molecules are needed to make one glucose).

Answer:

6 (the option with "6" as the choice)