Presentation on theme: "Photosynthesis The equation: 6CO 2 + 6H 2 O C 6 H 12 O 6 + 6O 2 energy in sunlight In words…. Carbon dioxide + water glucose + oxygen reactantsproducts."— Presentation transcript:
Photosynthesis The equation: 6CO 2 + 6H 2 O C 6 H 12 O 6 + 6O 2 energy in sunlight In words…. Carbon dioxide + water glucose + oxygen reactantsproducts
PHOTOSYNTHESIS 1. Plant cells may have organelles called chloroplasts. 2. Photosynthesis occurs in a plant cell’s chloroplasts. 3. It Occurs in 3 stages a. Energy is captured from sunlight b. The sun’s energy is used to make ATP c. Glucose is made
The majority of photosynthesis occurs in the leaves!
Stage 1: Capturing the Sun’s Energy 4. Occurs in the Chloroplast in small disks called thylakoids which contain the pigment chlorophyll
Stage 1: Capturing the Sun’s Energy 5. Chlorophyll traps energy from the sunlight
Stage 2: Using the Sun’s Energy to Form ATP 6. After chlorophyll captures energy from the sun, the energy moves to the membrane of the thylakoid. 7. In the thylakoid membrane, the energy is used to make ATP molecules.
Using the Sun’s Energy to Form ATP ADPSun’s energy ATP 8. ATP molecules are the only true energy source for living things. P (phosphate)
Stage 3: Making Carbohydrates (The Calvin Cycle) 9. ATP provides the activation energy to start the Calvin cycle (making carbohydrates) 10. Energy from ATP splits water molecules 11. Hydrogen binds with Carbon atoms from CO 2 in the air to make simple sugars (glucose = C-H-O) 12.Oxygen is released into the atmosphere
13. The Calvin Cycle assembles glucose monomers into polymers for energy use and growth. 14. Plants can store the sun’s energy in this carbohydrate form. 15. When a plant needs energy (food) to carry out life activities, chemical reactions break down the carbohydrates for energy. * PLANTS UNDERGO BOTH PHOTOSYNTHESIS AND CELLULAR RESPIRATION!
16. As long as ATP is available, this step of photosynthesis can occur in sunlight or in the dark.
Photosynthesis Converts sunlight into glucose (carbohydrate) for food Chloroplasts (thylakoids) Plants (some bacteria & protists) Carbon dioxide & water Oxygen, glucose 6CO 2 + 6H 2 O C 6 H 12 O 6 +6O2 Purpose Where Reaction occurs Present in… Raw Materials Products Formula energy in sunlight
Weird Plants!!! Carnivorous plants such as the Venus fly trap and the pitcher plant still undergo photosynthesis! They must get nitrogen from eating insects. Pitcher plant Venus Fly Trap