Question

What is Light Reaction?

Answer 1

Photosynthesis:

1. Photosynthesis is the process through which plants convert sunlight, water, and carbon dioxide into oxygen and sugar.
2. It takes place in the chloroplast of the plant.

Light reaction:

1. In the chloroplast of the mesophyll cells of the leaves, a light-dependent process takes place.
2. The chloroplasts are double-membraned cell organelles made up of thylakoids, which are stacked disc-like structures.
3. The light reaction takes place on the membrane of these thylakoids, which contains the pigment chlorophyll, which is essential for the process.
4. The light reaction is given as follows;

$2{\mathrm{H}}_2\mathrm{O}+2{\mathrm{NADP}}^{+}+3\mathrm{ADP}+3{\mathrm{P}}_{\mathrm{i}}\to {\mathrm{O}}_2+2{\mathrm{H}}^{+}+2\mathrm{NADPH}+3\mathrm{ATP}$