describe the roles of photosystems 1 and 2 in the light reaction.
Photosystem 2( produces ATP )
photosystem 1 produces NADPH,
- To begin photosynthesis, the chlorophyll molecule in photosystem II is
- excited by sunlight and the energy produced helps to break down a water
- molecule (H2O) into ½O2 (with electrons removed) and 2H+. The removed
- electrons are excited by the light energy. When the electrons prepare to
- come to their rest state, they go through an oxidative phosphorylation
- process and produces an ATP molecule.
- As the electrons are coming to a resting state, they are excited again
- in photosystem I and raised to a even higher energy state. The excited
- electrons are then used to produce NADP+ + H+. The highly energetic
- NADPH molecule is then fed into the Calvin Cycle to conduct carbon