Final answer:
In carbon fixation, NADPH is required to reduce CO2 into organic molecules like glucose, part of the Calvin cycle in photosynthesis. Chlorophyll absorbs photon energy, not ATP or glucose, and water and carbon dioxide are reactants in photosynthesis with G3P and oxygen as products. Therefore, correct option is d.
Step-by-step explanation:
In generating reducing power for carbon fixation, what is required is NADPH.
The process of carbon fixation involves the use of ATP and NADPH generated during the light-dependent reactions of photosynthesis to reduce carbon dioxide into organic molecules, such as glucose. This process is a key part of the Calvin cycle, which operates in the light-independent reactions of photosynthesis.
Carbon dioxide is not the source of electrons in photosynthetic electron transport chains; instead, water serves this role. During the light-dependent reactions, the molecule that absorbs the energy of a photon is chlorophyll, not ATP, glucose, or water.
The statement that in photosynthesis, water and carbon dioxide are the reactants and G3P (glyceraldehyde-3-phosphate) and oxygen are the products is correct. To clarify, statement d is true: In photosynthesis, water and carbon dioxide are reactants. G3P and oxygen are products.