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A photosystem is composed of a light-harvesting complex and an electron transport system. The light-harvesting complex captures light energy and transfers it to the reaction center, where electrons are excited and transferred through the electron transport system to generate ATP and NADPH during photosynthesis.
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Complex IV of the electron transport chain?
Directs electron to oxygen to form water
In which part of cellular respiration does rotenone have its effect?
Rotenone inhibits Complex I of the electron transport chain in cellular respiration, preventing the transfer of electrons from NADH to coenzyme Q. This disrupts the flow of electrons and ultimately impairs the production of ATP.
What stages of cellular respiration involve cytochromes?
Cytochromes are involved in electron transport chain, specifically in the complexes III and IV stages of cellular respiration. In complex III, cytochrome b and cytochrome c are key components, while in complex IV, cytochrome c oxidase plays a crucial role in the final transfer of electrons to oxygen.
How many coenzymes are reduced in the electron transport chain?
Two coenzymes present in Complex I: FMN (flavin mononucleotide) and CoQ (coenzyme Q or ubiquinone).
What goes in the electron transport chain?
In the electron transport chain, electrons are passed from one protein complex to another, using energy to pump protons across a membrane. This creates an electrochemical gradient that is used to generate ATP in a process known as oxidative phosphorylation. Oxygen is the final electron acceptor in the chain, which combines with protons to form water.
Which complex in the electron transport chain transfers electrons to the final electron acceptor?
The complex in the electron transport chain that transfers electrons to the final electron acceptor is called Complex IV, also known as cytochrome c oxidase.
What are the names of the complexes involved in the electron transport chain?
The complexes involved in the electron transport chain are named Complex I, Complex II, Complex III, Complex IV, and Complex V (also known as ATP synthase).
To which component of the electron transport chain does cyanide bind?
Cyanide binds the electron transport chain at the level of complex IV
Complex IV of the electron transport chain?
Directs electron to oxygen to form water
Which electron transport chain complex would be impaired by a deficiency of copper?
Complex IV
Complex II of the electron transport chain?
includes a succinate dehydrogenase
Complex I of the electron transport chain?
is responsible for accepting electrons from NADH
Which electron transport chain complexes would be impaired by an iron deficiency?
Complex I and II
What is the role of ubiquinone in the electron transport chain?
Ubiquinone carries electrons from the first enzyme complex to the second enzyme complex
Why doesnt chlorophyll run out of electrons during the electron transport chain?
The reduced quinone (QH2) is reoxidized to Q by complex III of the respiratory electron-transport chain (Section 18.3.3).
In complex II of the electron transport chain which is/are the coenzyme(s) mainly oxidized?
FADH2 only
Without a terminal electron acceptor, the electrons of and would have nowhere to be released, and all of the enzyme complexes involved with the electron transport chain?
Cyanide binds the electron transport chain at the level of complex IV
