Question

Which is an important difference between light-dependent (L-D) and light-independent (L-IND) reactions in photosynthesis?
The L-D reactions need CO2 and light energy, and the L-IND reactions needs water and O2.
The L-D reactions require light energy and water, and the L-IND reactions require ATP, NADPH, and CO2.
The L-D reactions can only occur during daylight, and the L-IND reactions can only occur during the night.
The L-D reactions need water and CO2, and the L-IND reactions need CO2 and light.

Answer 1

The second choice is correct.

Light-dependent reactions require light energy and water (photolysis) and produce ATP, NADPH and O2. Light-independent reactions (Calvin cycle) use ATP and NADPH plus CO2 to synthesize carbohydrates.