Circle the letter of each statement that is true about the Calvin Cycle. Correct the false statements. a) The main products of the Calvin cycle are six carbon dioxide molecules.
b) Carbon dioxide molecules enter the Calvin cycle from the atmosphere.
c) Energy from ATP and high-energy electrons from NADPH are used to convert 3-carbon molecules into similar 3-carbon molecules.
d) The Calvin cycle uses six molecules of carbon. dioxide to produce a single 6-carbon sugar molecule.