Question

what is the general purpose of the light reactions of photosynthesis? a to make sugar b to make oxygen c to convert light energy into chemical energy d to convert chemical energy into light energy

Explanation:

• In the light reactions of photosynthesis, light energy is absorbed by chlorophyll and other pigments.
• This energy is used to split water molecules (photolysis), releasing oxygen as a by - product.
• The energy is also used to produce ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate), which are forms of chemical energy.
• Option a: Making sugar occurs in the Calvin cycle (dark reactions), not the light reactions.
• Option b: While oxygen is produced as a by - product in the light reactions, the main purpose is energy conversion, not just oxygen production.
• Option d: The light reactions convert light energy to chemical energy, not the other way around.

Answer:

C. To convert light energy into chemical energy