Final answer:
Carbon dioxide is fixed into glucose during the Calvin cycle, not the light reactions. The light reactions occur in the thylakoid membrane, producing ATP and NADPH and releasing oxygen as a byproduct.
Step-by-step explanation:
All of the following statements about the light reactions of photosynthesis are true EXCEPT for statement D: Carbon dioxide is fixed into glucose. The light reactions occur in the thylakoid membrane, and their primary function is to generate ATP and NADPH.
These molecules temporarily store the chemical energy that is captured during the light reactions. During this process, water is split to release oxygen as a byproduct, which supports the fact that statement C is true. However, statement D is not true for the light reactions, as the fixation of carbon dioxide into glucose occurs during the Calvin cycle, which is a separate process and takes place in the stroma of the chloroplast.