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During cyclic photophosphorylation, the biochemical objective of PSI i

During cyclic photophosphorylation, the biochemical objective of PSI is to :-

  1. Oxidise NADPH
  2. Hydrolyse ATP
  3. Phosphorylate ADP
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11.2.1 Water Potential To comprehend plant-water relations, an understanding of certain standard terms is necessary. Water potential is a concept fundamental to understanding water movement. Solute potential and pressure potential are the two main components that determine water potential. Water molecules possess kinetic energy. Rn liquid and gaseous form they are in random motion that is both rapid and constant The greater the concentration of water in a system, the greater is its kinetic energy or 'water potential', Hence, it is obvious that pure water will have the greatest water potential. If two systems containing water are in contact, random movement of water molecules will result in net movement of water molecules from the system with higher energy to the one with lower energy. Thus water will move from the system containing water at higher water potential to the one having low water potential This process of movement af eubstanees lawn a gradient of free energy is called diffusion! Water potential is denoted by the Greek symbol Psi or and is expressed in pressure units-sttch as pascals (Pa). By convention, the water potential of pure water at standard temperatures, which is not under any pressureg is taken to be zero. If some solute is dissolved in pure water, the solution has fewer free water and the concentration of water decreases, reducing its water potential Hence, all solutions have a lower water potential than pure water; the magnitude of this lowering due to dissolution of a solute is called solute potential or is always negative. The more thrft solute molecules, the lower (more negative) is the . For a solution at atmospheric pressure (water potential) (solute potentiall ) If a pressure greater than atmospheric pressure is applied to pure water or a solution. its water potential increases. It is equivalent to pumping water from one place to another. Can you think of any system in our body where pressure is built up?|Pressure can build up in a plant system when water enters a plant cell due to diffusian causing a pressure built up against the cell wall, it makes the cell turgid (see section );
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Question Text
During cyclic photophosphorylation, the biochemical objective of PSI is to :-
Updated OnMar 29, 2022
TopicPlant Physiology
SubjectBiology
ClassClass 12
Answer Type Video solution: 1
Upvotes51
Avg. Video Duration3 min