What is pqh2 in photosynthesis?
What is pqh2 in photosynthesis?
Role in photosynthesis Plastoquinone is reduced when it accepts two electrons from photosystem II and two hydrogen cations (H+) from the stroma of the chloroplast, thereby forming plastoquinol (PQH2).
Why is b6 f complex important to photosynthesis?
Biological function In photosynthesis, the cytochrome b6f complex functions to mediate the transfer of electrons between the two photosynthetic reaction center complexes, from Photosystem II to Photosystem I, while transferring protons from the chloroplast stroma across the thylakoid membrane into the lumen.
What does the b6 F complex generate?
The cytochrome b6f complex provides the electronic connection between the photosystem I and photosystem II reaction centers of oxygenic photosynthesis and generates a transmembrane electrochemical proton gradient for adenosine triphosphate synthesis.
What is ps2 in biology?
Photosystem II (or water-plastoquinone oxidoreductase) is the first protein complex in the light-dependent reactions of oxygenic photosynthesis. It is located in the thylakoid membrane of plants, algae, and cyanobacteria.
What is Plastoquinone pool?
Abstract. The plastoquinone (PQ)-pool in chloroplast thylakoid membranes is a key electron carrier in the photosynthetic electron transport chain (PETC), and its redox state plays an essential role in the control of plant metabolism.
Where is Plastoquinone Plastoquinone located in chloroplast?
PQ and UQ are localized in different organelles of plant cells. PQ is located on the thylakoids of chloroplasts, while UQ is located on the inner membrane of mitochondria. The locations of PQ and UQ are consistent with their roles in photophosphorylation and oxidative phosphorylation.
What is Plastoquinone Plastocyanin?
Plastoquinone is an electron transporter that transports electron from photosystem II to cytochrome b6f. Plastocyanin, on the other hand, is a copper-containing electron carrier protein that accepts electrons from cytochrome b6f and passes to P700+ of photosystem I.
What is Plastoquinone plastocyanin?
What is PS1 and PS2 in photosynthesis?
Photosystem I (PS I) and photosystem II (PS II) are two multi-subunit membrane-protein complexes involved in oxygenic photosynthesis. The main difference between photosystem 1 and 2 is that PS I absorbs longer wavelengths of light (>680 nm) whereas PS II absorbs shorter wavelengths of light (<680 nm).
Is P680 reduced or oxidized?
The molecule is rapidly oxidized transferring its electron to the primary acceptor. Note: P680+ is the strongest biological oxidizing agent because it splits water into Hydrogen and Oxygen thus by oxidizing water P680 receives two electrons.
What is ATP ADP and NADPH?
ATP – Adenosine triphosphate. ADP – Adenosine diphosphate. NADP – Nicotinamide adenine dinucleotide phosphate. NADPH – The reduced form of NADP. In the Light Dependent Processes i.e Light Reactions, the light strikes chlorophyll a in such a way as to excite electrons to a higher energy state.
