Chapter 8 Notes Photosynthesis
Chapter 8 Notes Photosynthesis
Chapter 8 Notes Photosynthesis
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<strong>Photosynthesis</strong>: The energy fromsunlight is used to convert water andcarbon dioxide into high-energycarbohydrates (sugars and starches) andproduce oxygen as a waste product.
Equation:6CO 2 + 6H 2 O -> C 6 H 12 O 6 + 6O 2Reactants: Carbon Dioxide, Water, andSunlightProducts: Glucose and Oxygen
First Step: Plants gather the sun’s energywith light absorbing pigments calledchlorophyll. Chlorophyll absorbs red and blue light butreflects green light. This is why plantsappear green. Chlorophyll is located inside thechloroplast of the cell.
There are 2 basic reactions that occur inphotosynthesis:1. The light-dependent reaction.2. The light-independent reactioncalled the Calvin Cycle.
Water splits to produces oxygen gasas waste.Oxygen is released!
Second STEP: Uses the ATP and NADPH producedfrom the light-dependent reactionsand carbon dioxide from the air toproduce high energy sugars (glucose).
Plants use the sugars made during theCalvin Cycle to meet its energy needsand to build more complexmacromolecules such as cellulose thatit needs for growth and development. When heterotrophs eat plants they canalso use the energy stored in thesecarbohydrates.
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