Photosynthesis is the very nature of plants to produce their own food by converting light energy from the sun to chemical energy in the form of glucose. It occurs in the chloroplast; a part of the leaf that can be found in the mesophyll layer.
Light Dependent Reaction
Light Dependent Reaction is a process in which photosynthesis needs light to work out. In the thylakoid, a part in the chlorophyll, there are two photosystems that are involved in the process. The photosystem II and photosystem I. They were named in order of discovery but photosystem II functions first in the light reactions.
- Photosystem II- P680 can absorb light efficiently within 680 nm.
- Photosystem I- P700 can absorb light efficiently within 700 nm.
Processes in Light Dependent Reaction
- Linear electron flow
- Cyclic electron flow
Light Independent Reaction
Light Independent Reaction is a process of undergoing photosynthesis without the presence of light. It is also known as the Calvin-Benson Cycle because it was discovered by Melvin Calvin and Andrew Benson. It is an anabolic process, building carbohydrates from smaller molecules and consuming energy. It produces a carbohydrate called glyceraldehyde-3-phosphate.
*In the next post, you will learn more about light dependent & independent reactions.
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