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PHOTOSYNTHESIS OVERVIEW
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DO NOW▸What is the photosynthesis equation?
▸What are the reactants and the products in the above equation?
OVERVIEW OF PHOTOSYNTHESIS
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ENERGY▸Ability to do work
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LAW OF CONSERVATION OF ENERGY▸ Energy cannot be created nor destroyed
(it can only be changed to another form)
ATP (ADENOSINE TRIPHOSPHATE)
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ATP (ADENOSINE TRIPHOSPHATE)▸ Energy the cell can use
▸Why?
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WHERE DO WE GET ENERGY TO MAKE ATP?▸Organisms break down carbon-based
molecules to make ATP
▸Carbohydrates
▸ Lipids
▸ Proteins
DIFFERENT TYPES OF FOODS PROVIDE DIFFERENT AMOUNTS OF ATP
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▸ Fats yield 146 ATP
▸Carbohydrates yield 32-38 ATP
▸ Proteins yield 32-38 ATP
DIFFERENT TYPES OF FOODS PROVIDE DIFFERENT AMOUNTS OF ATP
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WHAT KINDS OF CELLS NEED ATP?▸ Prokaryotes (bacteria)
▸ Eukaryotes (plants and animals)
▸ALL CELLS!
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PHOTOSYNTHESIS▸ Process that captures light energy to make
sugars that store chemical energy
▸Occurs in the chloroplast
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CHLOROPLASTS▸Where photosynthesis occurs
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CHLOROPHYLL▸Molecule in chloroplast that absorbs light
energy
▸Gives the leaves their green color
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2 MAIN STAGES IN PHOTOSYNTHESIS▸ Light dependent reactions
▸Chlorophyll captures energy from sun
▸ATP and NADPH produced
▸ Light independent reactions (Calvin Cycle)
▸Uses ATP and NADPH (from light dependent reaction) to make sugar from CO2
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2 MAIN STAGES IN PHOTOSYNTHESIS
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PHOTOSYNTHESIS EQUATION
ILLUSTRATIVE SUMMARYPAGE 36 - UNDERNEATH DO NOW
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ILLUSTRATIVE SUMMARY‣ Use at least 4 colors
‣ ALL concepts must be used in a drawing, diagram, or flowchart
‣ LABEL where appropriate
HOMEWORKPAGE 36 - SUMMARY PHOTOSYNTHESIS: WHAT’S IN A LEAF?