Photosynthesis is a fundamental biological process by which green plants, algae, and certain bacteria convert light energy into chemical energy. This process primarily occurs in the chloroplasts of plant cells, where chlorophyll pigments absorb sunlight to power the synthesis of glucose from carbon dioxide and water.

The overall chemical reaction of photosynthesis produces oxygen as a by-product, which is essential for the survival of aerobic organisms. For FSC students, understanding this process is crucial as it forms the basis for many questions in the biology board exams.

The process consists of two major stages: the light-dependent reactions and the Calvin cycle (light-independent reactions). The light-dependent reactions convert solar energy into chemical energy in the form of ATP and NADPH, while the Calvin cycle uses these molecules to fix carbon dioxide and produce glucose.

By mastering the detailed steps and significance of photosynthesis, students can not only excel in exams but also appreciate the vital role plants play in sustaining life on Earth.