1. Energy and Photosynthesis

2. Energy Ability to do work
Adenosine Triphosphate – stores and releases energy, energy carrier

3. ADP + P -> ATP ATP – stores energy
To release energy – remove a phosphate group = ADP

4. Heterotrophs versus Autotrophs
Heterotrophs - Must consume food to obtain energy
Autotrophs - can make their own food using sunlight

5. Light Absorption Red, Orange, Yellow, Green, Blue, Indigo, Violet
Pigments – absorb wavelengths of light
Chlorophyll A and B – primarily absorb all
but Green, why leaves look green

6. Chloroplasts

7. High Energy Electrons High Energy Electron Carrier = NADP+
Carrier needed to move high energy electrons across thylakoid membrane
Accepts 2 high energy electrons along with a hydrogen ion
Becomes NADPH
NADP e- + H+ = NADPH
Remember the energy carrier… ATP

8. Overview of Photosynthesis
Write the chemical formula of photosynthesis
6H2O + 6CO2 + Light energy -> C6H12O6 + 6O2
Water + carbon dioxide + sun yields sugar (glucose) and oxygen
Reactants: water, carbon dioxide and sunlight
Products: glucose and oxygen
3 compounds made from the sugar produced in photosynthesis includes complex carbohydrates, proteins and lipids.

9. Light Dependent Stage of Photosynthesis
Location: Thylakoid (membrane and space)
Steps
Light is absorbed
Water is broken apart, Oxygen is produced
Produces ATP and NADPH to be used in Calvin cycle

11. Light Independent Stage of Photosynthesis
Location – Stroma
Light is NOT required
Steps
CO2 enters the cycle
ATP and NADPH use energy and high energy electrons to make a sugar
Calvin cycle goes around 3 times before a sugar is formed.

13. Overview of Photosynthesis

14. Factors affecting Photosynthesis
Temperature – photosynthesis likes warm temps but too hot and too cold can slow down the rate of photosynthesis
Light Intensity – an increase in light intensity will increase the rate of photosynthesis until a certain point, then it will not have an effect.
Water – water is a reactant, without water, photosynthesis will not occur and the plants will die.