photosynthesis
TRANSCRIPT
PHOTOSYNTHESIS – THE BASICS
Photosynthesis: What you’ve to UnderstandElectron Transport: Pigments/Light Harvesting Complex/ Photosystems
Membrane bound Complexes/ Proteins
Electron Transfer
Formation of Reducing power
• Dark Reaction:
Photosynthesis: What you’ve to Understand
RUBP and RUBISCO
Affinity of RUBISCO
CO2 Fixation
Formation of Extra Triose
C2, C3 and C4 Cycles/ Plants
Regeneration of RuBP
Photosynthetic Pigments
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Absorption and Action spectra of Photosynthesis
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TYPICAL CHLOROPLAST
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ARRANGEMENT OF VARIOUS MEMBRANE PROTEINS IN THYLAKOID
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Light Harvesting
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ELECTRON TRANSPORT: BACKBONE
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ELECTRON TRANSPORT: ENERGY LEVEL
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ELECTRON TRANSPORT: NADPH AND ATP SYNTHESIS
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CF1-CF0 ATPase
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ATP SYNTHESIS
BACTERIA
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ATP SYNTHESIS
CHLOROPLAST
ATP SYNTHESIS
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ATP SYNTHESIS
MITOCHONDRIA
ATP SYNTHESIS
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PHOTOSYNTHETIC CARBON REDUCTION
1. Carboxylation of the CO2 acceptor ribulose-1,5-bisphosphate, forming two molecules of 3-phosphoglycerate, the first stable intermediate of the Calvin cycle2. Reduction of 3-phosphoglycerate, forming gyceraldehyde-3-phosphate, a carbohydrate (triose)3. Regeneration of the CO2 acceptor ribulose-1,5-bisphosphate from glyceraldehyde-3-phosphate.
• Calvin Cycle or C3 cycle• First formed stable compound is a 3-carbon
compound• Energy in ATP and NADPH are used in the
synthesis of a triose which is the precursor of various macromolecules including carbohydrates, amino acids etc.
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Activation of RUBISCO
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Regulation of Calvin Cycle
• Light-Dependent Enzyme Activation Regulates the Calvin Cycle• RUBISCO Activity Increases in the Light (pH and Mg)• Light-Dependent Ion Movements Regulate Calvin Cycle Enzymes (Mg)• Light-Dependent Membrane Transport Regulates the Calvin Cycle
(carbon transport from Chloroplast, 1/6 th)
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KRANTZ ANATOMY
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C4 OR HATCH AND SLACK
CYCLE
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CAM METABOLISM
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