Photosystem I is involved in the cyclic photophosphorylation process. Both Photosystem I and II are involved in the non-cyclic photophosphorylation process. In the cyclic photophosphorylation, P is known to be the active reaction centre. In the non-cyclic photophosphorylation, P is known to be the active reaction centre. Electrons tend to pass in a cyclic manner. Electrons tend to pass in a non—cyclic manner.
Electrons return back to Photosystem I. ATP molecules get generated in this process. Water is not needed in the cyclic photophosphorylation process. Water is needed in the process and the process of photolysis takes place as well.
NADPH does not get produced. What is Photophosphorylation? The light-dependent reaction phase of photosynthesis is known as photophosphorylation. This process involves producing ATP three phosphate groups molecules from the ADP 2 phosphate groups in the plant cells' chloroplasts in the presence of light.
These reactions generate the following two molecules needed for the next stage of photosynthesis by utilizing the light energy. The energy storage molecule ATP. This process is carried out in the presence of photosystems. They are the functional units for photosynthesis.
They consist of complex pigment organizations that absorb and transfer light energy and assist in transferring electrons.
They are of 2 types: photosystem I and photosystem II. Photophosphorylation is of the Following Two Types. Cyclic Photophosphorylation. Non—cyclic photophosphorylation. We will now study these two types of photophosphorylation, their features, and the difference between cyclic and non-cyclic photophosphorylation. What is Cyclic Photophosphorylation? Answered by Smit V.
Need help with Biology? One to one online tuition can be a great way to brush up on your Biology knowledge. Answered by. It refers to the light reaction of the photosynthetic process, which predominately occurs in green plants and algae. Noncyclic photophosphorylation involves both the photosystems, i. It is termed noncyclic due to the zig-zag flow of electrons. It requires water hydrolysis to replenish electron loss by the PS-II. Oxygen is produced as a byproduct through the oxidation of water.
It involves photosystem-I that absorbs a photon of wavelength nm. Green sulfur and nonsulfur bacteria, purple bacteria, acidobacteria etc. Bacteria undergo cyclic photosynthesis via four bacteriochlorophylls. Two bacteriochlorophylls participate in the photon absorption, and the other two remains inactive. Thus, the reaction centre excites electrons to the next state via photon absorption by the special pair of bacteriochlorophyll. As the high energy electrons leave the reaction centre, it makes the bacteriochlorophyll positively charged.
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