What is used to passed excited electrons in the thylakoid membrane?

What is used to passed excited electrons in the thylakoid membrane?

The cytochrome complex, an enzyme composed of two protein complexes, transfers the electrons from the carrier molecule plastoquinone (Pq) to the protein plastocyanin (Pc), thus enabling both the transfer of protons across the thylakoid membrane and the transfer of electrons from PSII to PSI.

How are electrons transported through the thylakoid membrane?

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 the sequence of electron flow in photosynthesis?

NADPH → chlorophyll → Calvin cycle.

What reaction takes place in the thylakoid membrane?

Light-dependent reactions happen in the thylakoid membrane of the chloroplasts and occur in the presence of sunlight. The sunlight is converted to chemical energy during these reactions. The chlorophyll in the plants absorb sunlight and transfers to the photosystem which are responsible for photosynthesis.

What happens to the excited electrons in the PSII reaction center?

Light energy causes the excitation and loss of an electron from a PSII reaction center chlorophyll (P680). The excited electron is boosted to a higher energy state. Electrons are passed from a photosystem into a redox or electron transport chain, eventually attaching to a chlorophyll molecule in Photosystem I (P700).

What is an Energised electron?

Light Energises Electrons The electrons that were passed to the chlorophyll become energised by some of the trapped light energy — this changes them into high energy electrons.

What accepts the electron after it passes through the electron transport complex?

Oxygen sits at the end of the electron transport chain, where it accepts electrons and picks up protons to form water.

What happens when an excited electron is passed to an electron acceptor in the photosystem?

The excited electron is boosted to a higher energy state. The electron is attached to a primary electron acceptor (different from the one associated with Photosystem II). The electron is passed again through a series of redox reactions, eventually joining NADP+ and H+ to form NADPH.

What is the final electron acceptor in photosynthesis?

NADP
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 in the thylakoid membrane?

Thylakoids are membrane-bound compartments inside chloroplasts and cyanobacteria. They are the site of the light-dependent reactions of photosynthesis. In thylakoid membranes, chlorophyll pigments are found in packets called quantasomes. Each quantasome contains 230 to 250 chlorophyll molecules.

What is the role of the thylakoid membrane in photosynthesis?

the series of molecules down which excited electrons are passed in a thylakoid membrane. thylakoid membrane. Contains pigments, photosystems, ATP synthase, and an electron transport train and is responsible for the light-dependent aspect of photosynthesis.

How are hydrogen ions escaped from the thylakoid?

Hydrogen ions have a positive charge. Like in magnets, the same charges repel, so the hydrogen ions want to get away from each other. They escape the thylakoid through a membrane protein called ATP synthase.

Which is part of the electron transport chain?

electron transport chain. the series of molecules down which excited electrons are passed in a thylakoid membrane. thylakoid membrane. Contains pigments, photosystems, ATP synthase, and an electron transport train and is responsible for the light-dependent aspect of photosynthesis.

How does ATP move down the electron transport chain?

By moving through the protein they give it power, like water moving through a dam. When hydrogen ions move through the protein and down the electron transport chain, ATP is created. This is how plants turn to sunlight into chemical energy that they can use.

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