Table of Contents
What takes the electrons released in photosystem 1?
High-energy electrons, which are released as photosystem I absorbs light energy, are used to drive the synthesis of nicotine adenine dinucleotide phosphate (NADPH). Photosystem I obtains replacement electrons from the electron transport chain.
How do electrons gain energy in photosystem 2?
The heart of photosystem II is the reaction center, where the energy of light is converted into the motion of energized electrons. At the center is a key chlorophyll molecule. When it absorbs light, one of its electrons is promoted to a higher energy.
Where do electrons get their energy in photosystem I?
F. Photosystem I. Photosystem I receives electrons from plastocyanin or cytochrome c6 on the lumenal side of the thylakoid membrane and uses light energy to transfer them across the membrane to ferredoxin on the stromal side. It can also function in a cyclic electron transport pathway.
How do electrons gain energy?
The electron can gain the energy it needs by absorbing light. If the electron jumps from the second energy level down to the first energy level, it must give off some energy by emitting light. The atom absorbs or emits light in discrete packets called photons, and each photon has a definite energy.
What happen in photosystem 1?
Photosystem I receives electrons from plastocyanin or cytochrome c6 on the lumenal side of the thylakoid membrane and uses light energy to transfer them across the membrane to ferredoxin on the stromal side. It can also function in a cyclic electron transport pathway.
What happens when light hits photosystem 1?
Photosystem I absorbs a second photon, which results in the formation of an NADPH molecule, another energy carrier for the Calvin cycle reactions.
How do the energized electrons from photosystem 1 travel to photosystem 2?
A Recipe for Energy The electrons must travel through special proteins stuck in the thylakoid membrane. They go through the first special protein (the photosystem II protein) and down the electron transport chain. Then they pass through a second special protein (photosystem I protein).
What is electron energy?
The energy of an electron is of the same order of magnitude (is in the same range) as the energy of light. The lines in the spectrum of an element represent changes in the energy of electrons within the atoms of that element. The energy of an electron depends on its location with respect to the nucleus of an atom.
What happens when electrons gain energy?
If an electron gains energy in an atom then the electron gets excited and forms excited state of an atom. In an atom when electron gains energy the ground state of an atom in which the atom is most stable changes it’s state to exited state in which the atom is less stable than the ground state of atom.
Where does photosystem 1 get its electrons?
What happens in the photosystem 1?
What happens to the free energy released as electrons are passed from photosystem II to photosystem I through a series of electron carriers?
What happens to the free energy released as electrons are passed from photosystem II to photosystem I through a series of electron carriers? It is used to establish and maintain a proton gradient.