Nicholas Boileau Despreaux 8/5/2019 Title: Biology 11/17/06 Objectives: To learn about photosynthesis Class Topics Hand in W.S. 5.1 (DR/Quiz) before the bell rings All classes except 1A Review Chapter 4 Test Review 5.1 Notes 5.2 - photosynthesis "Honor is like an island, rugged and without a beach; once we have left it, we can never return." Nicholas Boileau Despreaux Monday, August 05, 2019 3:04 AM
Class Assignments W.S. 5.1 (DR/Quiz) 11/17/06 Read 94-96 11/17/06 8/5/2019 Class Assignments What By When W.S. 5.1 (DR/Quiz) 11/17/06 Read 94-96 11/17/06 Chapter 5 Quiz 1 11/21/06 Read 97-103 11/21/06 1A only W.S. 5.1 (DR/Quiz) 11/21/06 Due this class period Due next class period Due in the future
Grade Sheet 1A – SR p. 61 - 5 pts Measurement W.S. – 10 pts 8/5/2019 Grade Sheet 1A – SR p. 61 - 5 pts Measurement W.S. – 10 pts 3A SR p. 42 – 6 pts 4A – SR p. 47 – 5 pts 2A – Measurement W.S. – 10 pts
Cellular Energy Adenosine = adenine + ribose 8/5/2019 Cellular Energy Adenosine = adenine + ribose ATP - adenosine tri(3)phosphate - used by the cell for energy Energy currency Energy stored in PO43- bonds ADP - Adenosine Di(2)phosphate - used to regenerate ATP Burning vs cellular respiration Burning uncontrolled, is fast, releases much heat and light cellular respiration controlled by 26+ enzymes, is slow, and releases less heat and no light
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Terminology Autotroph Heterotroph Trophic levels Cellular respiration 8/5/2019 Terminology Autotroph Obtains energy from light Heterotroph Obtains energy from other sources Trophic levels Ex. Sun – plant – herbivore – carnivore Cellular respiration Process used to harvest energy from organic compounds Photosynthesis Process by which light energy is converted to chemical energy
Chapter 5 Quiz 1 Review ADP and ATP ATP/ADP cycle Energy in ATP 8/5/2019 Chapter 5 Quiz 1 Review ADP and ATP ATP/ADP cycle Include all information Energy in ATP Heterotroph/Autotroph Light, water, CO2 to make sugar? Cellular respiration Energy source for all living things Food chain
8/5/2019 Photosynthesis Taking light energy and changing it to chemical energy to make organic compounds occurs in chloroplasts (only autotrophs) Sun The source for all living thing’s energy 6CO2 + 6 H20 C6H12O6 + 6O2 Different from book
Chloroplasts Site of photosynthesis Composed of: 8/5/2019 Chloroplasts Site of photosynthesis Composed of: grana - stacks of thylakoids - contain pigment (chlorophyll) site of light dependent reaction stroma - the fluid around the grana site of light independent reaction
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Light White light - spectrum of many colors and wavelengths ROYGBIV 8/5/2019 Light White light - spectrum of many colors and wavelengths ROYGBIV Chlorophyll absorbs mostly blue and red light Reflects green light
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Overview Light reaction (light dependent) - occurs in grana 8/5/2019 Overview Light reaction (light dependent) - occurs in grana Changes light energy to ATP and other high energy molecules Dark Reaction (light independent) - occurs in stroma Uses ATP and other high energy molecules to make sugar
Light Dependent Reaction 8/5/2019 Light Dependent Reaction Light energy is absorbed by chlorophyll Energy transferred to an electron Electron must be replaced Water split 2 H+, 2 e-, O
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Light Dependent Reaction 8/5/2019 Light Dependent Reaction Energy from the excited electrons is transferred Electron transport chain Photosystem II In grana Makes ATP
Light Dependent Reaction 8/5/2019 Light Dependent Reaction Photosystem I The electrons are energized again (more light energy) Energy is transferred to change NADP+ into NADPH NADP+ is an electron carrier (takes the high energy electrons to the stroma for use in the light independent reaction Nicotinamide adenine dinucleotide phosphate