photosystem

Examples of photosystem in the following topics:

• The Two Parts of Photosynthesis

  • Two types of photosystems are embedded in the thylakoid membrane: photosystem II ( PSII) and photosystem I (PSI).
  • Each photosystem plays a key role in capturing the energy from sunlight by exciting electrons.
  • Photosystems consist of a light-harvesting complex and a reaction center.
  • In photosystem I, the electron comes from the chloroplast electron transport chain.
  • As explained above, the photosystems manipulate electrons with energy harvested from light.

• Processes of the Light-Dependent Reactions

  • Light energy is converted into chemical energy in a multiprotein complex called a photosystem.
  • Two types of photosystems, photosystem I (PSI) and photosystem II (PSII), are found in the thylakoid membrane inside the chloroplast .
  • The light-dependent reactions begin in photosystem II .
  • A photosystem consists of a light-harvesting complex and a reaction center.
  • In (b) photosystem I, the electron comes from the chloroplast electron transport chain.

• Gas Requirements

  • Often, they respire oxygen as rapidly as it is supplied, keeping the amount of free oxygen low. 3) Aerobes that require oxygen to grow, yet their nitrogenase is still debilitated if exposed to oxygen. 4) Oxygenic photosynthetic bacteria generate oxygen as a by-product of photosynthesis, yet some are able to fix nitrogen as well. 5) And finally, Anoxygenic photosynthetic bacteria that do not generate oxygen during photosynthesis as they have only a single photosystem which cannot split water.

• Anoxygenic Photosynthesis

  • Bacteriochlorophylls c-g have the corresponding "peak" absorbance at more blue wavelengths when dissolved in an organic solvent, but are similarly red-shifted within their natural environment (with the exception of bacteriochlorophyll f, which has not been naturally observed).Unlike oxygenic phototrophs, anoxygenic photosynthesis only functions using (by phylum) either one of two possible types of photosystem.

• Benzoate Catabolism

  • The photo-system required for hydrogen production in Rhodobacter (PS-I) differ from its oxygenic photosystem (PS-II) due to the requirement of organic acids and the inability to oxidize water.

• Cyanobacteria

  • The water-oxidizing photosynthesis is accomplished by coupling the activity of photosystem (PS) II and I (Z-scheme).

• Anoxygenic Photosynthetic Bacteria

  • Unlike oxygenic phototrophs, anoxygenic photosynthesis only functions using either one of two possible types of photosystem.