What are the final electron acceptors for the electron transport chains in light reactions?
The four photosystems absorb light energy through pigments—primarily the chlorophylls, which are responsible for the green color of leaves. The light-dependent reactions begin in photosystem II. When a chlorophyll "a" molecule within the reaction center of PSII absorbs a photon, an electron in this molecule attains an excited energy level. Because this state of an electron is very unstable, the electron is transferred from one to another molecule creating a chain of redox reactions, called an electron transport chain (ETC). The electron flow goes from PSII to cytochrome "bf" to PSI. In PSI, the electron gets the energy from another photon. The final electron acceptor is NADP. In oxygenic photosynthesis, the first electron donor is water, creating oxygen as a waste product. In anoxygenic photosynthesis various electron donors are used.
What is the final electron acceptor for the electron transport chains in light reactions?
NADP
Light-dependent reactions
To make NADPH, purple bacteria use an external electron donor (hydrogen, hydrogen sulfide, sulfur, sulfite, or organic molecules such as succinate and lactate) to feed electrons into a reverse electron transport chain.
What is the final electron acceptor molecule for the electron transport chains after gaining the hydrogen in light reactions?
NADPH
Light-dependent reactions
Light-dependent reactions
https://en.wikipedia.org/wiki/Light-dependent%20reactions
Thus, electron transfer proceeds efficiently from the first electron acceptor to the next, creating an electron transport chain that ends if it has reached NADPH.
Light-dependent reactions
This chain of electron acceptors is known as an electron transport chain.
Light-dependent reactions
In light reactions, the final electron acceptor in the electron transport chain is NADP. In light reactions, the electron transfer proceeds efficiently from the first electron acceptor to the next, creating an electron transport chain that ends if it has reached NADPH.