What is the difference between light dependant and light independent photosynthesis? T

Mar 11, 2018

Light dependent part of photosynthesis is concerned with production of ATP and $N A D P H 2$ utilizing solar energy.

Light independent part of photosynthesis involves reduction of $C {O}_{2}$ to ${C}_{6} {H}_{12} {O}_{6}$.

Explanation:

Photosynthesis consists of 2 steps:

1.Light reaction or Hill's reaction
2.Dark reaction or Blackmann's reaction

In light reaction, solar energy is entrapped by chlorophyll pigment. Solar energy is converted into chemical energy in the form of ATP molecules. This is termed by photophosphorylation . Hydrolysis of water occurs to liberate ${O}_{2}$ and reducing power in the form of $N A D P H 2$ is produced.

Dark reaction involves reduction of $C {O}_{2}$ to glucose ( ${C}_{6} {H}_{12} {O}_{6}$) utilizing ATPs and $N A D P H 2$ produced during light reaction.

Dark reaction thus can occur independent of light but is dependent upon the end products of the light-dependent reaction.