Is PS1 needed to make NADPH?

Electrons are transferred sequentially between the two photosystems, with photosystem I acting to generate NADPH and photosystem II acting to generate ATP.
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Does photosystem 1 make NADPH?

Photosystem I is an integral membrane protein complex that uses light energy to catalyze the transfer of electrons across the thylakoid membrane from plastocyanin to ferredoxin. Ultimately, the electrons that are transferred by Photosystem I are used to produce the moderate-energy hydrogen carrier NADPH.
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Is NADPH formed in PS1?

NADPH is generated at photosystem I in photosynthesis. Anaerobic respiration, which includes glycosis, generates NADH.
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What is the purpose of PS1 in photosynthesis?

Abstract. Photosystem I (PSI) is a multisubunit protein complex located in the thylakoid membranes of green plants and algae, where it initiates one of the first steps of solar energy conversion by light-driven electron transport.
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Is PSI needed to make NADPH True or false?

PSI does contain the pigment chlorophyll, is needed to make NADPH, and uses light energy to energize electrons, but it does not split water to get electrons—that's the role of PSII.
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Photosynthesis (UPDATED)

What is needed to produce NADPH?

The electrons and protons are used to produce NADPH (the reduced form of nicotine adenine dinucleotide phosphoric acid) and ATP (adenosine triphosphate). ATP and NADPH are energy storage and electron carrier/donor molecule. Both ATP and NADPH are used in the next stage of photosynthesis.
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Does PSI produce NADPH?

That energy is relayed to the PSI reaction center (called P700). P700 is oxidized and sends a high-energy electron to NADP+ to form NADPH. Thus, PSII captures the energy to create proton gradients to make ATP, and PSI captures the energy to reduce NADP+ into NADPH.
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What is the difference between PS1 and PS2 in photosynthesis?

Photosystem II has a quinone type reaction centre (also known as Q-Type or type II), while photosystem I has an iron-sulphur (FeS) type reaction centre (or type I). Both families of RC are present in membranes of oxygenic photosynthetic organism.
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What happens at PS1?

Photosystem I receives electrons from plastocyanin or cytochrome c6 on the lumenal side of the thylakoid membrane and uses light energy to transfer them across the membrane to ferredoxin on the stromal side. It can also function in a cyclic electron transport pathway.
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What comes first, PS1 or PS2 in biology?

There are two types of photosystems in the light-dependent reactions, photosystem II (PSII) and photosystem I (PSI). PSII comes first in the path of electron flow, but it is named as second because it was discovered after PSI.
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What generates NADPH?

Regeneration of cytosolic NADPH from NADP occurs by three well-validated routes: malic enzyme 1 (ME1), isocitrate dehydrogenase 1 (IDH1), and the oxidative pentose phosphate pathway (oxPPP), in which NADPH is produced by both glucose-6-phosphate dehydrogenase (G6PD) and 6-phosphogluconate dehydrogenase (PGD) (Fig.
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How is NADPH formed in psi?

Generating Another Energy Carrier: NADPH

As the electron from the electron transport chain arrives at photosystem I, it is re-energized with another photon captured by chlorophyll. The energy from this electron drives the formation of NADPH from NADP+ and a hydrogen ion (H+).
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Does PS2 produce NADPH?

PS1 and PS2 essentially do the same thing but at different optimal light wavelengths, but only PS2 provides electrons for the production of NADPH.
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How is NADPH formed in PS1?

Electrons are transferred from the PS II and then passed on to the pigments of PS I. Then, electrons get excited and transferred to another acceptor. These electrons are then moved downhill again to a molecule of NADP+. The addition of these electrons results in the formation of NADPH.
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Does photosynthesis produce NADH or NADPH?

NADPH is a product of the first level of photosynthesis. It helps to fuel the reactions that occur in the second stage of the process of photosynthesis. Plant cells require light energy, water, and carbon dioxide for carrying out the steps of the photosynthesis process.
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What are both ATP and NADPH required for?

Both ATP and NADPH are utilized in the phase of calvin cycle.
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What does Photosystem 1 produce?

Electrons are transferred sequentially between the two photosystems, with photosystem I acting to generate NADPH and photosystem II acting to generate ATP.
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What happens in PS1?

What is happening to matter in the PS1? During this process, the energy is used to pump hydrogen molecules in from the stroma to the thylakoid membrane. Once the electrons are at PS1, the electrons become PS1's. The electrons then are passed down another transport chain and bond with NADP+, to create NADPH.
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What is PS1 involved in?

(i) PS I is involved in non-cyclic photophosphorylation only. (ii) PS II is involved in both cyclic and non-cyclic photophosphorylation. (iii) Stroma lamellae membranes possess PS I only, whereas grana lamellae membranes possess both PS I and PS II.
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Why does photosystem 1 need photosystem 2?

Photosystem I was discovered and named first, followed by photosystem II, which was discovered second. Another reason why photosystem II goes first is that photosystem I depend on the electron that is liberated by photosystem II.
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What is photosystem 2 for dummies?

Photosystem II (PSII) is a membrane protein supercomplex that executes the initial reaction of photosynthesis in higher plants, algae, and cyanobacteria. It captures the light from the sun to catalyze a transmembrane charge separation.
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How is NADPH generated?

NADPH is produced from NADP+. The major source of NADPH in animals and other non-photosynthetic organisms is the pentose phosphate pathway, by glucose-6-phosphate dehydrogenase (G6PDH) in the first step. The pentose phosphate pathway also produces pentose, another important part of NAD(P)H, from glucose.
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How does photosystem 1 make NADPH?

Light energy splits water and extracts electrons in photosystem II (PSII); then electrons are moved from PSII to cytochrome b6f to photosystem I (PSI) and reduce in energy. Electrons are re-energized in PSI and those high energy electrons reduce NADP+ to NADPH.
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Where does NADPH get its energy from?

As the electron from the electron transport chain arrives at photosystem I, it is re-energized with another photon captured by chlorophyll. The energy from this electron drives the formation of NADPH from NADP+ and a hydrogen ion (H+).
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