Question

What are the products of Photosystem 1 and Photosystem 2? Name three important products from photosystem 2 and photosystem 1 and identify where they are used.

Answer 1

Photosystem II finally produces oxygen which goes into the atmosphere and also ATP through an electron transport chain and ATP synthase.

Photosystem I finally produces just NADPH through another electron transport chain.

Both ATP and NADPH are used in the production of glucose from carbon dioxide taken from the atmosphere during the subsequent light independant reactions.

Under normal conditions, electrons flow from PS II through cytochrome bf to PSI. Photosystem I (PSI) optimally absorbs photons of wavelength of 700 nm. It is responsible for providing high energy electrons with which to reduce NADP+ to produce NADPH to be used in the Calvin cycle.