What is produced in the electron transport chain of photosystem II?
Photosystem II obtains replacement electrons from water molecules, resulting in their split into hydrogen ions (H+) and oxygen atoms. The oxygen atoms combine to form molecular oxygen (O2), which is released into the atmosphere.
How does photosystem 2 generate ATP?
In Photosystem II which also called water- plastoquinone oxidoreductase, the generated hydrogen ions help to create a proton gradient that is used by ATP synthase to generate ATP, and the transferred energized electrons are used to reduce 2NADP+ to 2NADPH.
Does photosystem 2 produce ATP?
This is accomplished by the use of two different photosystems in the light reactions of photosynthesis, one to generate ATP and the other to generate NADPH. Electrons are transferred sequentially between the two photosystems, with photosystem I acting to generate NADPH and photosystem II acting to generate ATP.
What type of protein is photosystem 2?
membrane protein supercomplex
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.
What does the cytochrome complex do?
A cytochrome complex plays a key part in electron transport associated with the membranes of the thylakoids in the process of photosynthesis. It accepts electrons from Photosystem II through plastoquinone and contributes to proton transport across the membrane.
Where is ATP produced in photosynthesis?
stroma side
ATP and NADPH are produced on the stroma side of the thylakoid membrane, where they can be used by the Calvin cycle.
How many electron transport chains are in photosystem II?
Answer and Explanation: In photosynthesis, there are two electron transport chains.
What is produced in photosystem 2 quizlet?
Photosystem II produces a proton gradient that drives the synthesis of ATP.
Does the cytochrome complex produce ATP?
Lesson Summary. Cytochromes represent a group of proteins responsible for electron transport in the electron transport chain (ETC). As such, cytochromes play an essential role in the production of ATP, the energy currency of the cell, in a variety of organisms.
What happens at complex 4 in the electron transport chain?
Complex IV of the electron transport chain, also known as cytochrome c oxidase, is a multiunit structure that functions to transfer electrons form cytochrome c to oxygen and in the process form water and help generate a proton gradient.
Which of these is responsible for the transport of electrons between photosystem II and photosystem I?
The reduction and regeneration steps of the Calvin cycle would slow down and eventually stop. Which of the following is responsible for the transport of electrons between photosystem II and photosystem I? cytochrome b6f.
What does photosystem II do?
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.
What protein must the hydrogen ions flow through to produce ATP?
ATP synthase
Hydrogen ions in the matrix space can only pass through the inner mitochondrial membrane through a membrane protein called ATP synthase. As protons move through ATP synthase, ADP is turned into ATP. The production of ATP using the process of chemiosmosis in mitochondria is called oxidative phosphorylation.
What is complex 4 in the electron transport chain?
What does the cytochrome b6 f complex do?
The cytochrome b6f complex provides the electronic connection between the photosystem I and photosystem II reaction centers of oxygenic photosynthesis and generates a transmembrane electrochemical proton gradient for adenosine triphosphate synthesis.
What is complex 3 in the electron transport chain?
The third protein complex in the electron transport chain is named Q-cytochrome c oxidoreductase and is commonly labeled Complex III. It catalyzes the transfer of electrons from the reduced coenzyme Q (ubiquinol) to cytochrome c for transport to Complex IV, the final step in the electron transport chain.
What are the protein complexes in the electron transport chain?
The ETC proteins in a general order are complex I, complex II, coenzyme Q, complex III, cytochrome C, and complex IV. Coenzyme Q, also known as ubiquinone (CoQ), is made up of quinone and a hydrophobic tail. Its purpose is to function as an electron carrier and transfer electrons to complex III.
Where do electrons get their energy in photosystem II?
The heart of photosystem II is the reaction center, where the energy of light is converted into the motion of energized electrons. At the center is a key chlorophyll molecule. When it absorbs light, one of its electrons is promoted to a higher energy.
What happens in the photosystem 2 protein when it is hit by a photon of light?
A photon strikes photosystem II to initiate photosynthesis. Energy travels through the electron transport chain, which pumps hydrogen ions into the thylakoid space. This forms an electrochemical gradient.