Cyclic Photophosphorylation is part of the light dependent reaction and produces_______. (Fill in the blank)?

Photophosphorylation is the process of creating ATP using a Proton gradient created by the Energy gathered from sunlight. The process of creating the Proton gradient resembles that of the electron transport chain of Respiration. But since formation of this proton gradient is light-dependent, the process is called Photophosphorylation.

No carbohydrates such as sugars.



Light absorbed by chlorophyll or other photosynthetic pigments such as carotene is used to drive a transfer of electrons and hydrogen from water (or some other donor molecule) to an acceptor called NADP+, reducing it to the form of NADPH by adding a pair of electrons and a single proton (hydrogen nucleus). The water or some other donor molecule is split in the process; it is the light reaction which produces waste oxygen.

The light reaction also generates ATP by powering the addition of a phosphate group to ADP, a process called photophosphorylation. ATP is a versatile source of chemical energy used in most biological processes. The ATP produced in this part of photosynthesis is used to build up carbohydrates in the next part of photosythesis, known as the light independent stage or the Calvin Cycle. Note, however, that the light reaction produces no carbohydrates such as sugars. The light reaction occurs in the stacked membranes of the grana in the thylakoid membrane.

Oxygen and NADPH2

ATP