Photosynthesis
- Created by: GEEKGIRL98
- Created on: 27-09-15 07:43
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- Photosynthesis
- Overview
- Takes place in chloroplast
- Carbon dioxide+water forms Glucose+Oxygen, with the addition of light energy from the sun
- Three main stages
- LIR
- LDR
- Chloroplasts
- Grana- stacks of thylakoids- site of light dependent reaction
- Stroma- site of light independent reaction. Fluid filled matrix
- Takes place in chloroplast
- Light Dependent Reaction
- Oxidation and reduction
- Reduction- loss of oxygen and gain of electrons
- Oxidation- combine with oxygen and loses electrons
- Making ATP
- Chlorophyll absorbs energy- electrons increase in energy level. Leave chlorophyll
- Taken up by electron carrier and passed down chain of oxidation-reduction reactions. EC=reduced
- Energy is lost as they are passed along this chain. This energy is used to combine ADP and inorganic phosphate, forming ATP
- Taken up by electron carrier and passed down chain of oxidation-reduction reactions. EC=reduced
- Chlorophyll absorbs energy- electrons increase in energy level. Leave chlorophyll
- Photolysis of water
- Chlorophyll needs to get electrons back. Light energy is used to provide electrons, protons and oxygen from water
- Electrons given back to chlorophyll, oxygen used in respiration, protons used to reduce NADP- form NADPH
- Chlorophyll needs to get electrons back. Light energy is used to provide electrons, protons and oxygen from water
- Oxidation and reduction
- Light Independent Reaction
- The Calvin Cycle
- Factors affecting rate
- Light Intensity
- Temperature
- Carbon dioxide concentration
- Overview
- Takes place in chloroplast
- Carbon dioxide+water forms Glucose+Oxygen, with the addition of light energy from the sun
- Capturing light- chlorophyll
- Three main stages
- LIR
- LDR
- Three main stages
- Taken up by electron carrier and passed down chain of oxidation-reduction reactions. EC=reduced
- Energy is lost as they are passed along this chain. This energy is used to combine ADP and inorganic phosphate, forming ATP
- Carbon dioxide from atmosphere combines with RuBP
- The Calvin Cycle
- Produces two molecule of 3-carbon GP
- ATP and NADPH from LDR are used to reduce GP to triose phosphate (TP)
- NADP reformed and goes back to LDR
- Some TP is converted into organic substances
- Most TP is used to regenerate RuBP using ATP from LDR
- Some TP is converted into organic substances
- NADP reformed and goes back to LDR
- ATP and NADPH from LDR are used to reduce GP to triose phosphate (TP)
- Produces two molecule of 3-carbon GP
- ATP and NADPH from LDR are used to reduce GP to triose phosphate (TP)
- NADP reformed and goes back to LDR
- Some TP is converted into organic substances
- Most TP is used to regenerate RuBP using ATP from LDR
- Some TP is converted into organic substances
- NADP reformed and goes back to LDR
- ATP and NADPH from LDR are used to reduce GP to triose phosphate (TP)
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