Question

Photophosphorylation is the process in which

• A. $C{O}_2$ and $O_2$ unite.
• B. Phosphoglyceric acid is produced.
• C. Aspartic acid is formed.
• D. Light energy is converted into chemical energy through production of ATP.

Answer 1

The correct option is D Light energy is converted into chemical energy through production of ATP.

Photophosphorylation is the process in which light energy is converted into chemical energy through production of ATP. The process of reduction of $NADP$ into $NADP+H^{+}$ may be denoted as electron transport system (ETS). It is the process of formation of ATP from ADP and inorganic phosphate (ip) utilising light energy. The flow of electrons through ETS is linked to photophosphorylation. Electron transport chain is a series of electron carriers over which electrons pass in a downhill journey releasing energy at every step that is used in generating an electrochemical proton gradient which helps in synthesising ATP. Based on path of electrons, associated photophosphorylation can be identified as non-cyclic and cyclic phosphorylation.