- A Amount of ATP and NADPH produced (cyclic makes only ATP; non-cyclic makes ATP + NADPH + O2)
- B The specific wavelength of light absorbed by the reaction center pigments specifically
- C The total amount of carbon dioxide that becomes fixed directly during each separate pathway
- D The type of chlorophyll molecule, a or b, used specifically within each photosystem complex
Correct answer: A. Amount of ATP and NADPH produced (cyclic makes only ATP; non-cyclic makes ATP + NADPH + O2)
Explanation: Cyclic photophosphorylation (PS I only): produces ATP only. Non-cyclic (PS II + PS I): produces ATP + NADPH, and water is oxidized releasing O2.
Concept context
Light reactions, the Calvin cycle, C3/C4/CAM pathways, photorespiration, and factors affecting the rate of photosynthesis. One of the highest-yield NEET chapters.