1. Q.Q. 10/18/18

2. D ATP  ADP Releases energy

3. Unit 2 Photosynthesis: An Overview
*Add definition of Photosynthesis at the top of your notes!!
Photosynthesis: the conversion of light energy to chemical energy (glucose)

4. Amoeba Sisters - Photosynthesis and the Teeny Tiny Pigment Pancakes

5. Chlorophyll & Chloroplast
Chlorophyll: is a molecule in chloroplasts that absorbs light energy in the thylakoid, but reflects green light
Chloroplast: are organelles in plants where photosynthesis occurs
They are made up of thylakoids needed for photosynthesis

6. Thylakoids—tiny disk-like structures in chloroplast that contain chlorophyll
Are interconnected and arranged in stacks of pancakes (granum)
Chlorophyll pigments are located in thylakoid membranes
Stroma- fluid-filled region outside the thylakoids

7. Chloroplast

8. Overview of Photosynthesis
Photosynthesis—light energy from the sun is used to convert water and carbon dioxide (reactants) into high energy sugars and oxygen (products)
Photosynthesis Reaction
Light
Energy

9. Photosynthesis has 4 main steps:
Steps 1 and 2 are light-dependent reactions
Steps 3 and 4 are light-independent reactions also called the Calvin Cycle (Dark Reactions)

11. Light-Dependent Reaction
Require the presence of light & light absorbing pigments
These reactions take place within the thylakoid membranes

12. Light-Dependent Reaction (Continued)
Step 1: Chlorophyll captures sun’s energy
Water (H2O) is broken down
Oxygen is released
Step 2: Energy carried along thylakoid membranes to molecules that carry energy to the light independent reactions.

13. Light-Independent Reactions or Calvin Cycle
Does not require direct involvement of light
These reactions use energy from
light-dependent reactions to synthesize sugars
The Calvin Cycle takes place in stroma of chloroplasts
Step 3: CO2 is added to create larger molecules
Step 4: A molecule of glucose is created
Light & dark reaction animation

14. Factors Affecting Photosynthesis
The most important factors that affect photosynthesis are:
Temperature
Light intensity
Availability of water