Do now activity Explain what photosynthesis is. Where does photosynthesis take place? What is the name of the carbohydrate that plants make using light energy? What is the difference between stroma and thylakoid? What is the name of the pigment that makes plants green? Write the photosynthesis EQUATION.

Section 2-2: LDR & Calvin Cycle Essential Question What does the Light Dependent Reaction produce? What does the Calvin Cycle produce? Learning Target Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy. Section 2-2: LDR & Calvin Cycle

announcements Biology Tutoring schedule W&F @ 7:00AM Section 2 Quiz 1 Scheduled for Friday: 9/22/17 Section 2 Lab Scheduled for Wednesday: 9/27/17 Class website will be updated today

Available Extra Credit announcements Available Extra Credit 1 Ream of Colored Printer Paper = 1 Class Pass (Limit 1 per student per chapter)

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overview Photosynthesis occurs in the Chloroplast of a plant cell. Two main reactions: 1. Light-dependent 2. Calvin Cycle

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Light Dependent Reactions thylakoids thylakoid LDR happens in the _________ .

Light Dependent Reactions Produces O2 Converts ADP into ATP Converts NADP+ into NADPH

Light Dependent Reactions NADPH is an electron carrier. (nicotinamide adenine dinucleotide phosphate) It can accept and transfer electrons

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Parts of the Light Dependent reaction Photosystem 2 Electron Transport Chain Photosystem 1 Hydrogen Ion Movement ATP Formation

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LDR: How it works Photosystem 2 Electron Transport Chain Photosystem 1 Hydrogen Ion Movement ATP Formation

LDR: How it works A. Photosystem 2 Light is absorbed Energy goes to electrons Electrons pass through ETC Water broken up into electrons, H+, and O2

“Enzyme” To the ETC

LDR: How it works Photosystem 2 Electron Transport Chain Photosystem 1 Hydrogen Ion Movement ATP Formation

LDR: How it works B. Electron Transport Chain Electrons move through ETC to Photosystem 1

Welcome to “ETC Freeway” To the Photosystem 1 From Photosystem 2 Welcome to “ETC Freeway”

LDR: How it works Photosystem 2 Electron Transport Chain Photosystem 1 Hydrogen Ion Movement ATP Formation

LDR: How it works C. Photosystem 1 (I) Light is absorbed Energy goes to electrons Electrons used to make: NADP+  NADPH

“NADPH”

LDR: How it works Photosystem 2 Electron Transport Chain Photosystem 1 Hydrogen Ion Movement ATP Formation

LDR: How it works D. Hydrogen Ion Movement Inner thylakoid membrane fills up with H+

LDR: How it works Photosystem 2 Electron Transport Chain Photosystem 1 Hydrogen Ion Movement ATP Formation

LDR: How it works E. ATP Formation H+ pass through ATP synthase to make: ADP  ATP

ATP Synthase

To the Stroma!

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Photosynthesis occurs in the Chloroplast of a plant cells. Two main reactions: 1. Light-dependent 2. Calvin Cycle

The Calvin Cycle Reactions taking place in the _____ that do not need light. The Calvin Cycle uses ATP and NADPH to make _____. stroma sugar

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Calvin Cycle: How it works 6 CO2 molecules enter the cycle

Calvin Cycle: How it works Energy from ATP and NADPH are used

Calvin Cycle: How it works Glucose is made

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Factors Affecting Photosynthesis Water Amount can slow or stop photosynthesis Temperature Photosynthesis depends on enzymes that function best between 0ºC and 35ºC Light intensity Increases photosynthesis until maximum rate reached

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