What’s photosynthesis?

Photosynthesis is the biochemical process by which green plants, algae, and some bacteria convert light energy into chemical energy. This chemical energy is stored in glucose (sugar) molecules, which the organisms use for fuel and growth.

Here's a breakdown of the process: • Inputs: Photosynthesis requires three main inputs: carbon dioxide ($\text{CO}_2$) from the air, water ($\text{H}_2\text{O}$) absorbed from the soil, and light energy (typically from the sun). • Location: In plants and algae, photosynthesis primarily occurs in specialized organelles called chloroplasts, which contain a green pigment called chlorophyll. Chlorophyll absorbs light energy. • Process: The light energy captured by chlorophyll is used to convert carbon dioxide and water into glucose and oxygen. This process involves a series of complex reactions, broadly divided into light-dependent reactions and light-independent reactions (Calvin cycle). • Outputs: The primary products of photosynthesis are glucose ($\text{C}_6H_{12}O_6$), which serves as the plant's food, and oxygen ($\text{O}_2$), which is released into the atmosphere as a byproduct.

The overall balanced chemical equation for photosynthesis is: $6CO_2 + 6H_2O + Light Energy \longrightarrow C_6H_{12}O_6 + 6O_2$ Photosynthesis is vital for life on Earth as it produces the oxygen we breathe and forms the base of most food chains.