Which statement describes the final outcome of the light reactions?

Which statement describes the final outcome of the light reactions?

• A. NADP+ is reduced to NADPH
• B. Oxygen is released as a primary product
• C. ATP and NADPH are passed to the Calvin Cycle
• D. Glucose is produced directly

Answer: (C)

Light reactions capture light energy to produce energy carriers that fuel the rest of photosynthesis. The key outcome is that ATP and NADPH are generated and exit the thylakoid to power the Calvin cycle, which fixes carbon into sugars. Oxygen is released as a byproduct of water splitting, but it’s not the product that drives the next stage. So the statement that best describes the final outcome is that ATP and NADPH are passed to the Calvin Cycle. Glucose isn’t produced directly during the light reactions; it’s formed later using the ATP and NADPH.

Light reactions capture light energy to produce energy carriers that fuel the rest of photosynthesis. The key outcome is that ATP and NADPH are generated and exit the thylakoid to power the Calvin cycle, which fixes carbon into sugars. Oxygen is released as a byproduct of water splitting, but it’s not the product that drives the next stage. So the statement that best describes the final outcome is that ATP and NADPH are passed to the Calvin Cycle. Glucose isn’t produced directly during the light reactions; it’s formed later using the ATP and NADPH.