photosynthis A16

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  • Created by: phebez
  • Created on: 03-11-15 15:55
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  • A16 PHOTOSYNTHESIS
    • overview
      • photosynthesis occurs in the leaf where there's chloroplast
      • 6CO2+ 6H2O = C6H12O6+6O2
    • photosynthesis is a process of energy transformation in which light energy is firstly changed into electrical energy and then into chemical energy.
    • LAW OF LIMITING FACTORS
      • photosynthesis is made up of a series of small reactions. it's the slowest of those reactions that determines the overall rate of photosynthesis
        • TEMPERATURE
        • LIGHT INTENSITY
        • CARBON DIOXIDE
    • LIGHT-DEPENDENT REACTION
      • PURPOSE: TO PRODUCE ATP+ SPLIT WATER
        • SITE: THYLAKOIDS
      • PHOTON OF LIGHT HITS THE CHLOROPHYLL PIGMENT
        • THE PHOTON CAUSES AN ELECTRON TO BE EXCITED TO A HIGHER ENERGY STATE
          • THE ELECTRON IS HELD IN AN ELECTRON CARRIER AND MOVES DOWN THE ETC- LOSING ENERGY THROUGH REDOX- ENERGY USED TO MAKE ATP
            • ELECTRON LOST FROM PS1 REPLACED BY AN E FROM PS2
              • EXCITED E FROM PS1 MOVES DOWN AN ETC AND USED TO PRODUCE REDUCED NADP
    • LIGHT-INDEPENDENT REACTION
      • SITE: STROMA
      • CO2 COMBINES WITH RuBP
        • COMBINATION PRODUCES 2X GP
          • ATP+ REDUCED NADP FROM LDR USED TO REDUCE THE ACTIVATED GP INTO 2X TP
            • NADP REFORMED AND GOES BACK TO LDR
              • SOME TP CONVERTED TO ORGANIC MOLECULES MOST IS USED TO REGENERATE RuBP
  • adaptions of the leaf
    • large surface area that allows the leaf to collect as much sunlight as possible
    • thin- diffusion pathway is short
    • numerous stomata
    • transparent cuticle to let light through
    • long, narrow mesophyll packed with chloroplasts
    • arrangement of leaves avoids shadowing by other leaves
    • air spaces in lower mesophyll to allow gas diffusion
    • overview
      • photosynthesis occurs in the leaf where there's chloroplast
      • 6CO2+ 6H2O = C6H12O6+6O2
  • PHOTON OF LIGHT HITS THE CHLOROPHYLL PIGMENT
    • THE PHOTON CAUSES AN ELECTRON TO BE EXCITED TO A HIGHER ENERGY STATE
      • THE ELECTRON IS HELD IN AN ELECTRON CARRIER AND MOVES DOWN THE ETC- LOSING ENERGY THROUGH REDOX- ENERGY USED TO MAKE ATP
        • ELECTRON LOST FROM PS1 REPLACED BY AN E FROM PS2
          • EXCITED E FROM PS1 MOVES DOWN AN ETC AND USED TO PRODUCE REDUCED NADP
  • LIGHT-INDEPENDENT REACTION
    • SITE: STROMA
    • CO2 COMBINES WITH RuBP
      • COMBINATION PRODUCES 2X GP
        • ATP+ REDUCED NADP FROM LDR USED TO REDUCE THE ACTIVATED GP INTO 2X TP
          • NADP REFORMED AND GOES BACK TO LDR
            • SOME TP CONVERTED TO ORGANIC MOLECULES MOST IS USED TO REGENERATE RuBP

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