Photosynthesis

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Find notes, videos, important points and questions to practice on each of these concepts.

Most Important Concepts (Do or Die)

• Electron Transport Chain
  
  
• C3 Pathway
  
  
• Hatch Slack Pathway
  
  

Important Concepts (Should Do)

• Photosynthesis - Concept
  
  
• Photosynthetic Pigments
  
  
• Chlorophylls
  
  
• Photosynthetic Unit
  
  
• Photosystems
  
  
• Photophosphorylation
  
  
• Carbon Fixation
  
  
• CAM Pathway
  
  

Not So Important Concepts (Do if you have time)

• Absorption Spectrum
  
  
• Phycobilins
  
  
• Photorespiration
  
  
• Factors Affecting Photosynthesis
  
  
• Baterial Photosynthesis
  
  
• Chemosynthesis
  
  
• Translocation of Organic Nutrients
  
  

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Energy absorbed is transmissible between pigments by resonance transfer, following the rule that such a transmission/passage would always by from a pigment with shorter absorption maximum (or lambda) to a pigment with longer lambda. Thus every photosystem (or pigment system) has only pigment molecule with longest maximum (like Chl a 700/P700 in PS I and Chl a 680/P680 in PS II) action as photoreaction center that exits as electron when sufficiently stimulated due to energy transfer by the neighbouring molecules of secondary/ accessory Pigments in an assembly of 300 molecules comprising each photosystem.

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Low velocity of Calvin cycle is mostly because of the efficiency of RuBP - carboxylase (or Rubisco).

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Under monochromatic illumination, photosynthesis is best in red light. In natural conditions however best photosynthesis would be under appropriately intense sunlight.

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