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A photosynthetic reaction center (or photosynthetic reaction center) is a complex of several proteins, pigments and other co-factors assembled together to execute the primary energy conversion reactions of photosynthesis. Molecular excitations, either originating directly from sunlight or transferred as excitation energy via light-harvesting antenna systems, give rise to electron transfer reactions along a series of protein-bound co-factors. These co-factors are light-absorbing molecules (also named chromophores orpigments) such as chlorophyll and phaeophytin, as well as quinones. The energy of thephoton is used to promote an electron to a higher molecular energy level of a pigment. The free energy created is then used to reduce a chain of nearby electron acceptors, which have subsequently higher redox-potentials. These electron transfer steps are the initial phase of a series of energy conversion reactions, ultimately resulting in the production of chemical energy during photosynthesis.
The complex of proteins and pigments assembled together to carry out the primary energy conversion reactions of photosynthesis is known as the reaction center.
Gianni Wilderman
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What is the reaction when chlorophyll donates excited electrons?
the reaction center.
What is the reaction that complex the part of a photosystem that donates excited electrons?
It is the Reaction Center Complex as I assume you are doing the Campbell Biology Chapter 7 Reading Review.
What is photosystems?
The group of proteins and pigments that transfers electrons to reaction center
What pigment molecules absorb a photon and pass the energy to the reaction-center complex?
chlorophyll
What is the main role of pigment molecules within the antenna or light harvesting complex?
The light-harvesting (or antenna) complex of plants is an array of protein and chlorophyll molecules embedded in the thylakoid membrane which transfer light energy to one chlorophyll a molecule at the reaction center of a photosystem.
What is the reaction when chlorophyll donates excited electrons?
the reaction center.
What type of chlorophyll does the reaction center contain?
The reaction center contains special chlorophyll called Chlorophyll a.
Does the center of the reaction in the dark reaction split the water?
False
What is the reaction that complex the part of a photosystem that donates excited electrons?
It is the Reaction Center Complex as I assume you are doing the Campbell Biology Chapter 7 Reading Review.
Do the energized electrons at the primary electron acceptor flow to the reaction center?
No, the electrons flow from the reaction center to the primary electron center. Just the opposite of what you said.
What happens after the reaction center receives energy from molecules in the light harvesting complex?
It passes the energy to the reaction center ( a specialized region of photosystem) then the energized electrons leave the reaction centers and are passed to adjacent electron transport chains (ETC)
What is the reaction to gravity?
things fall towards the center of the earth
What is photosystems?
The group of proteins and pigments that transfers electrons to reaction center
What does a phtosystem contain?
Photosystem is composed of pigments, reaction center and electron acceptor
What pigment molecules absorb a photon and pass the energy to the reaction-center complex?
chlorophyll
What is the main role of pigment molecules within the antenna or light harvesting complex?
The light-harvesting (or antenna) complex of plants is an array of protein and chlorophyll molecules embedded in the thylakoid membrane which transfer light energy to one chlorophyll a molecule at the reaction center of a photosystem.
What are photosystems made of?
In the thylakoid membrane a number of light-harvesting complexes and a reaction center complex. The chlorophyll a molecule at the reaction center of photosystem II is called P680. At the reaction center of photosystem I is a chlorophyll a molecule called P700.
