Photosynthesis

1. Mesophyll A layer of cells that contain & are responsible for most of the plant’s photosynthesis chloroplasts Page 2

2. Stomata Openings in plant leaves that allow for to occur (CO 2 ) passes in and (O 2 ) passes out. CO 2 O2O2O2O2 gas exchange Carbon Dioxide Oxygen Page 2

Mesophyll Cell 3. Chloroplast The site of ___________ Photosynthesis Double-membrane bound organelle 5. Inner membrane 4. Outer membrane Page 2

6. Stroma: 7. Thylakoid 8. Grana: 8. Grana resides in these membranes Chlorophyll Page 2 Fluid filled space within the chloroplast A stack of _________ thylakoids

Why are leaves green? Substances that absorb light are called Page 5 Chlorophyll a Chlorophyll b Carotenoids Chlorophyll absorbs and light, reflecting pigments redbluegreen

Photosynthesis Occurs in 2 Steps: 1)Light Reactions in the thylakoid 2)Calvin Cycle in the stroma. Calvin Cycle is also referred to as the Dark Reactions or Light Independent Reactions Calvin Cycle (Light Independent or Dark Reactions)

Photosynthesis: The Light Reaction are chemical factories powered by the sun. The particles of sunlight are called _________ Page 5 Chloroplasts photons

Their thylakoids have the pigment chlorophyll. Chlorophyll act like solar panels that transform light energy into energy carriers called and. To make and, the thylakoid uses and makes gas. Page 5 NADPH ATP Photosynthesis: The Light Reaction NADPH ATP water (H 2 O) oxygen (O 2 )

Summary of Light Reactions 6 H O 2 ATP NADPH

What are and used for in Photosynthesis? NADPH ATP

ATP & NADPH energy are used to convert CO 2 into glucose NADPH ATP 6 CO 2 Sugar! This is done during the Calvin Cycle in the stroma…

Summary of Photosynthesis 6 H O 2 ATP NADPH 6 CO 2 C 6 H 12 O 6 (sugar) Calvin Cycle

Photosynthesis Equation: The General Formula for Photosynthesis is: 6CO 2 + 6H 2 O + (Light )  C 6 H 12 O 6 + 6O 2 Calvin Cycle Light Reactions Light Reactions Calvin Cycle Light Reactions

Photosynthesis is responsible for the majority of the biomass in our biosphere

This biomass supports the upper trophic levels, but only 10% of their energy can be transferred up the food chain

Let’s play the photosynthesis magnet board race!