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The electrons released by P700 of PS-I in the presence of light are taken up by the primary acceptor and are then passed on to ferredoxin (Fd), plastoquinone (PQ), cytochrome complex, plastocyanin (PC) and finally back to P700 i.e., electrons come back to the same molecule after cyclic movement.
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Electrons from what replaces the electrons from photosystem 2 during noncyclic electron flow?
water
Photophosphorylation differs from oxidative phosphorylation in that?
Photophosphorylation occurs in chloroplasts during photosynthesis, where light energy is used to generate a proton gradient and drive ATP synthesis. In contrast, oxidative phosphorylation occurs in mitochondria, where electrons are transferred along the electron transport chain to generate a proton gradient and drive ATP synthesis using energy released from the oxidation of nutrients.
What are the products of a non-cyclic electron flow?
The products of non-cyclic electron flow in photosynthesis are ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate). This process occurs during the light-dependent reactions of photosynthesis and helps to generate energy-rich molecules that are used in the Calvin cycle to produce glucose.
What happens to the high energy electrons and hydrogen held by NADH if there is no O2?
If there is no oxygen present, the high-energy electrons held by NADH cannot be passed along the electron transport chain for energy production, resulting in a buildup of NADH and disrupted cellular respiration. The fate of the high-energy electrons and hydrogen held by NADH may vary depending on the organism, but typically, fermentation pathways are activated to regenerate NAD+ so glycolysis can continue generating ATP anaerobically.
How is the energy used to make ATP via the electron transport chain generated?
It is enerated in plants during the process photophosphorylation (aka. photosynthesis) It is generated in plants through the process of photophosphorylation, in the thylakoid membranes of chloroplasts.
In noncyclic photophosphorylation what is the ultimate acceptor of electrons that have been produced from the splitting of water?
Carbon dioxide is a noncyclic photophosphorylation and is the ultimate acceptor of electrons that have been produced from the splitting of water. A product of both cyclic and noncyclic photophosphorylation is ATP.
The electrons that are passed to NADPH during noncyclic photophosphorylation were obtained from?
The electrons that are passed to NADPH during noncyclic photophosphorylation were obtained from water. The ultimate electron and hydrogen acceptor in the noncyclic pathway is NADPH+.
Which process requires electrons that are obtained by the splitting of water A cyclic photophosphorylation B noncyclic photophosphorylation C Photorespiration?
B noncyclic photophosphorylation requires electrons that are obtained by the splitting of water. The process involves the flow of electrons through both photosystem I and photosystem II to generate ATP and NADPH for the light-independent reactions of photosynthesis.
What is the difference between cycle and noncycle photophosphorylation?
Cycle photophosphorylation occurs in cyclic electron flow, where electrons are recycled to produce ATP but not NADPH. Noncyclic photophosphorylation involves both photosystems I and II to produce both ATP and NADPH using electrons extracted from water.
What is produced by noncyclic photophosphorylation and used by the Calvin cycle?
ATP and NADPH
What is the fate of the NADPH molecules created during noncyclic photophosphorylation?
NADPH molecules created during noncyclic photophosphorylation are used in the Calvin cycle to help convert carbon dioxide into glucose, a process known as carbon fixation. The NADPH molecules provide reducing power necessary for the synthesis of sugars in the stroma of the chloroplast.
What is returned to chlorophyll in cyclic photophosphorylation that is not returned in noncyclic photoreduction?
In cyclic photophosphorylation, electrons are returned to the reaction center of the chlorophyll molecule, allowing for the production of ATP. In noncyclic photoreduction, electrons are not returned to the same chlorophyll molecule but are instead transferred to other molecules, like NADPH, for use in the Calvin cycle.
Is oxygen created during NADPH?
No, oxygen is created from the splitting of water as a waste product. After the electrons from the splitting of water go through photosystem 2 & 1, they would be used to create NADPH in noncyclic photophosphorylation.
Origin of oxygen as a byproduct of noncyclic photophosphorylation?
Plant, green algae and some bacterial photosynthesis depend on noncyclic electron flow, which means that electrons lost by the photosystems are not recycled back to the photosystems but instead passed on to NADPH. To replenish electrons lost by the photosystems, these organisms rely on an oxygen evolving complex (mechanism not well understood) that split water into protons, electrons, and oxygen. The electrons are used to replenish electrons lost by the photosystems, the protons are used to generate the proton gradient used to produce ATP, and oxygen, not used by the plant, leaves as a byproduct.
Electrons from what replace the electrons from photosystem 2 during noncyclic electron flow?
water
The direct products of noncyclic photophosphorylation are?
The direct products of noncyclic photophosphorylation are ATP and NADPH. This process occurs during the light-dependent reactions of photosynthesis in plants and algae, where light energy is used to generate these energy-rich molecules.
Electrons form replace the electrons from photosystem 2 during noncyclic electric flow?
water
