What is Z in photosynthesis?
The Z-scheme is an energy diagram for electron transfer in the “light reactions” of plant photosynthesis. It applies equally well to photosynthesis by algae and cyanobacteria. The vertical energy scale shows each molecule’s ability to transfer an electron to (i.e., to reduce) the next one from left to right.
What does the Y axis of the Z diagram of photosynthesis represent?
Notice that the Z scheme diagram has a Y-axis, which is electron energy. A photon arrives at Photosystem II. The energy from this photon bounces around the photosystem until it reaches the reaction center at P680. As the electron moves from one embedded electron carrier in the chain to the next, it releases energy.
What is involved in Z scheme of photosynthesis 4 points?
In non cyclic photophosphorylation, the whole scheme of transfer of electrons, starting from the PSII, uphill to the acceptor, down the electron transport chain to PSI, excitation of electrons, transfer to another acceptor, and finally down hill to NADP+ causing it to be reduced to NADPH+H+ is called as the Z scheme.
What is Z diagram?
The “Z‐scheme” describes the oxidation/reduction changes during the light reactions of photosynthesis. Absorption of a photon excites P680 to P680*, which “jumps” to a more actively reducing species. P680* donates its electron to the quinone‐cytochrome bf chain, with proton pumping.
What does the Z shape of the Z scheme actually represent?
The shape of the Z-scheme comes from the fact that the special pigments, P680 and P700 (where P stands for pigment), in PSII and PSI, respectively, have a different redox potential in the ground state versus the excited state. An Updated Z-Scheme Describing Photosynthetic Electron Transfer.
Which of the following is involved in Z scheme of photosynthesis?
Three major protein complexes are involved in running the “Z” scheme: (1) Photosystem II; (2) Cytochrome bf complex (containing Cytb6; FeS; and Cytf ) and (3) Photosystem I.
What is NADPH and ATP?
ATP is a versatile energy currency for cells while NADPH is a source of electrons that can pass along to an electron acceptor. The function of ATP is that it acts as a major energy storing and transferring molecule. On the other hand, NADPH works as a coenzyme and reducing the power of biochemical reactions.
What does NADH stand for?
nicotinamide adenine dinucleotide
NADH stands for “nicotinamide adenine dinucleotide (NAD) + hydrogen (H).” This chemical occurs naturally in the body and plays a role in the chemical process that generates energy.