Both photosystems contain many pigments that help collect light energy, as well as a special pair of chlorophyll molecules found at the core (reaction center) of the photosystem. The special pair of photosystem I is called P700, while the special pair of photosystem II is called P680..
Also question is, what is the difference between p680 and p700?
It is located on the inner surface of the thylakoid membrane. P700 is the photo center. P680 is the photo center. Photosystem I or PS 1 contains chlorophyll A-670, chlorophyll A-680, chlorophyll A-695, chlorophyll A-700, chlorophyll B, and carotenoids.
Similarly, what does p680 stand for? P680, or Photosystem II primary donor, (where P stands for pigment) refers to either of the two special chlorophyll dimers (also named special pairs), PD1 or PD2.
Beside above, what is the role of p680?
The reaction center chlorophyll (or the primary electron donor) of photosystem II that is most reactive and best in absorbing light at wavelength of 680 nm. Supplement. P680 is a group of pigments that are excitonically coupled or that act as if the pigments are a single molecule when they absorb a photon.
What is the role of p700 in photosynthesis?
P700, or photosystem I primary donor, (where P stands for pigment) is the reaction-center chlorophyll a molecule in association with photosystem I. Its absorption spectrum peaks at 700 nm. When photosystem I absorbs light, an electron is excited to a higher energy level in the P700 chlorophyll.
Related Question Answers
What is the function of p700?
P700. The reaction center chlorophyll (or the primary electron donor) of photosystem I that is most reactive and best in absorbing light at wavelength of 700 nm. P700 consists of a group of pigments acting as a single entity or like a single molecule when it receives excitation energy.Why is it called p700?
Once an electron has gone down the first leg of the electron transport chain, it arrives at PSI, where it joins the chlorophyll a special pair called P700. Because electrons have lost energy prior to their arrival at PSI, they must be re-energized through absorption of another photon.Can photosystem 1 operate alone?
Photosystem I probably was the 1st to develop and can exist independently of Photosystem II to create energy for a plant. However, the enzymes it is associated with when it works independently are different then those it is associated with when it works with Photosystem II.How many ATP are formed in light reaction?
2 ATP
How many ATP are produced in Noncyclic Photophosphorylation?
Because 6 turns of non cyclic photophosphorylation will produce 12 NADPH2 and 6 ATP molecules. And cyclic photophosphorylation will produce 12 ATP molecules.Why is p680 the strongest oxidizing agent?
The molecule is rapidly oxidized transferring its electron to the primary acceptor. Note: P680+ is the strongest biological oxidizing agent because it splits water into Hydrogen and Oxygen thus by oxidizing water P680 receives two electrons.What is the function of Nadph?
Function of NADPH NADPH function in transferring electrons and a hydrogen displaced by the energy of sunlight. The NADPH first accepts the electrons and hydrogen when special enzymes transfer these particles to the molecule NADP+.What is the purpose of photosystem 1?
Photosystem I (PSI, or plastocyanin-ferredoxin oxidoreductase) is the second photosystem in the photosynthetic light reactions of algae, plants, and some bacteria. Photosystem I is an integral membrane protein complex that uses light energy to produce the high energy carriers ATP and NADPH.Is p680 a pigment?
P680 is a group of pigments that are excitonically coupled or that act as if the pigments are a single molecule when they absorb a photon. It derived its name after the wavelength (in nanometers) at which it is best in capturing. P680 is the strongest biological oxidizing agent known at present.What color is p680?
red
What is the difference between cyclic and noncyclic Photophosphorylation?
Water will first be broken down into 4H+ ions and 4e- (electrons) and oxygen. So in non-cyclic photophosphorylation, you make oxygen, from splitting the water molecule, you make ATP using the H+ ions and you make NADPH. In cyclic photophosphorylation, you only use photosystem I.Is photosystem 1 cyclic or noncyclic?
Non-cyclic Electron Flow. Under certain conditions, the photoexcited electrons take an alternative path called cyclic electron flow, which uses photosystem I (P700) but not photosystem II (P680). This process produces no NADPH and no O2, but it does make ATP.What are the products of light dependent reactions?
The two products of the light-dependent reactions of photosystem are ATP and NADPH. The movement of high energy electrons releases the free energy that is needed to produce these molecules. The ATP and NADPH are used in the light-independent reactions to make sugar.What are the products of the Calvin cycle?
The reactions of the Calvin cycle add carbon (from carbon dioxide in the atmosphere) to a simple five-carbon molecule called RuBP. These reactions use chemical energy from NADPH and ATP that were produced in the light reactions. The final product of the Calvin cycle is glucose.Where are the ATP and Nadph used?
Unlike the light reactions, which take place in the thylakoid membrane, the reactions of the Calvin cycle take place in the stroma (the inner space of chloroplasts). This illustration shows that ATP and NADPH produced in the light reactions are used in the Calvin cycle to make sugar.Where do dark reactions occur?
The "light-independent" or dark reactions happen in the stroma of the chloroplasts. This is also known as the Calvin Cycle. Since these processes can only happen in the chloroplast (a chlorophyll filled plastid in green plants), photosynthesis can only happen in green plants!What does the Chemiosmotic process in chloroplasts involve?
Chemiosmosis is when diffusion takes place to allow an atom or molecule through a membrane. So, when the chemiosmotic process involves chloroplasts, an event takes place. This causes a proton gradient to take place.How is ATP produced in light reactions?
The Light Reactions of Photosynthesis. Light is absorbed and the energy is used to drive electrons from water to generate NADPH and to drive protons across a membrane. These protons return through ATP synthase to make ATP. 
