The primary electron acceptor of PSII during Non- cyclic photophosphorylation in plants is:a)A0b)Plastoquinonec)Fe- Sd)PhaeophytinCorrect answer is option 'D'. Can you explain this answer?

Question

Answer

During Non-cyclic photophosphorylation first electron acceptor from PS-।। Is phaeophytin.

Answer

Primary acceptor. the special pair of each photosystem passes electron to a different primary acceptor .The primary electron acceptor of PSII is phaeophytin , an organic molecule that resembles chlorophyll, while the primary electron acceptor of psi is a chlorophyll called Ao	extA_0Ao7,8^{7,8}7, that's it.

Answer

The primary electron acceptor of Photosystem II (PSII) during non-cyclic photophosphorylation in plants is Phaeophytin. Let's understand the process and the role of Phaeophytin in detail.

Non-cyclic photophosphorylation is the process of capturing light energy and converting it into chemical energy in the form of ATP and NADPH. It occurs in the thylakoid membranes of chloroplasts. PSII is one of the two photosystems involved in this process.

1. Photosystem II (PSII):
Photosystem II is responsible for capturing photons of light and generating high-energy electrons. It consists of several components, including pigment molecules (chlorophylls), a reaction center, and electron carriers.

2. Role of Phaeophytin:
Phaeophytin is a pigment molecule that is structurally similar to chlorophyll but lacks a magnesium ion at its center. It acts as the primary electron acceptor in PSII. When a photon of light is absorbed by a chlorophyll molecule in PSII, an electron in the chlorophyll molecule gets excited and is transferred to the Phaeophytin molecule.

3. Electron Transport:
Once the electron is transferred to Phaeophytin, it moves through a series of electron carriers in the thylakoid membrane. These carriers include plastoquinone (PQ), cytochrome b6f complex, and plastocyanin. The movement of electrons through these carriers results in the generation of a proton gradient across the thylakoid membrane.

4. Proton Gradient and ATP Synthesis:
The proton gradient generated by the electron transport chain is used to drive ATP synthesis. As the electrons move through the carriers, protons are pumped across the thylakoid membrane from the stroma to the lumen. The accumulation of protons in the lumen creates a concentration gradient, and the flow of protons back to the stroma through ATP synthase leads to the synthesis of ATP.

5. Oxygen Evolution:
During PSII, water molecules are also split, releasing oxygen as a byproduct. This process is called oxygen evolution and is essential for the production of oxygen in the atmosphere.

In conclusion, Phaeophytin serves as the primary electron acceptor in PSII during non-cyclic photophosphorylation in plants. It accepts the high-energy electrons generated by the absorption of light and transfers them to the electron transport chain, ultimately leading to the synthesis of ATP and NADPH.

Answer

During Non-cyclic photophosphorylation first electron acceptor from PS-।। Is phaeophytin.

Answer

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