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What is the primary electron acceptor in Photosystem II?
The primary electron acceptor in Photosystem II is a molecule called plastoquinone. Plastoquinone accepts electrons from chlorophyll after they are excited by light, and transfers them to the cytochrome complex in the thylakoid membrane.
Where does dcmu affect electron transfer system in thylakoid?
DCMU inhibits the electron transfer system in thylakoid membranes by targeting photosystem II (PSII). Specifically, it binds to the QB site of the D1 protein in PSII, preventing the transfer of electrons to plastoquinone. This leads to photoinhibition and blocks the flow of electrons from water to plastoquinone in the light reactions of photosynthesis.
What molecule precedes the electron transport chain of both photo-system you and photo- system II?
The molecule that precedes the electron transport chain in both photosystem I and photosystem II is plastoquinone. Plastoquinone accepts electrons from the reaction center chlorophyll in both photosystems and transfers them to the cytochrome b6f complex to ultimately generate ATP.
What DCMU inhibits electron transport in chloroplast by preventing the reduction?
DCMU (3-(3,4-dichlorophenyl)-1,1-dimethylurea) inhibits electron transport in chloroplasts by blocking the plastoquinone binding site in photosystem II. This prevents the reduction of plastoquinone and disrupts the flow of electrons in the photosynthetic electron transport chain. As a result, the light-dependent reactions of photosynthesis are impaired, leading to decreased ATP and NADPH production. Consequently, this inhibition affects overall photosynthetic efficiency and plant growth.
Which metal ion is responsible for electron transportation in photosynthesis?
The metal ion responsible for electron transportation in photosynthesis is magnesium (Mg2+). It plays a crucial role in the chlorophyll molecule within the thylakoid membrane of chloroplasts, where it helps facilitate the movement of electrons during the light reactions of photosynthesis.
In chloroplasts an acceptor of electrons lost from chlorophyll and also found in the thylakoid membrane?
The acceptor of electrons lost from chlorophyll in chloroplasts is the protein complex called plastoquinone. It is an essential component of the electron transport chain in the thylakoid membrane, where it transfers electrons to other components in the chain to generate ATP and NADPH during photosynthesis.
What are the first step in photosyntheis?
During the first step of photosynthesis, the chloroplasts (which give plants their green color) capture the energy from the sunlight. In the second step, the cell uses the captured energy (ATP) to produce sugars in the form of glucose.
What is photosystem 11?
Photosystem II is a protein complex in plants and algae that is essential for the process of photosynthesis. It absorbs light energy and uses it to drive the transfer of electrons from water to plastoquinone. This eventually leads to the production of ATP and NADPH, which are important energy carriers used in the Calvin cycle to convert carbon dioxide into sugar.
Where do electrons from photo system 2 arrive at?
Electrons from Photosystem II (PSII) ultimately arrive at the electron transport chain, specifically at plastoquinone, which transfers the electrons to plastocyanin and then to Photosystem I (PSI). This process is part of the light-dependent reactions of photosynthesis, where the energy captured from light is used to generate ATP and NADPH. The movement of electrons through the chain also contributes to the formation of a proton gradient, which drives ATP synthesis.
What is the homophone for role?
the homophone for role = roll
What part of speech is role?
Role is a noun.
Which is the series of molecules through which excited electrons are passed down a thylakoid membrane?
The series of molecules through which excited electrons are passed down a thylakoid membrane during photosynthesis is called the electron transport chain. This chain consists of various protein complexes and molecules, such as plastoquinone, cytochrome b6f complex, and plastocyanin, that work together to transfer electrons and generate a proton gradient used to produce ATP.
