Life on Earth is solar powered. Photosynthesis => conversion of light energy to chemical energy (stored in sugars and other organic molecules).
|
|
- Lindsey Bates
- 5 years ago
- Views:
Transcription
1 Photosynthesis Life on Earth is solar powered. Photosynthesis => conversion of light energy to chemical energy (stored in sugars and other organic molecules). Organisms obtain organic compounds by one of two major modes: autotrophic nutrition or heterotrophic nutrition. 1) Autotrophs => self feeders => producers of the biosphere Photoautotrophs => use light as a source of energy to synthesize organic compounds. ex. plants, algae, some protists, some prokaryotes Chemoautotrophs => use inorganic substances (sulfur and ammonia) as a source of energy Exclusive to prokaryotes. 2) Heterotrophs => feed on organic compounds produced by other organisms => consumers of the biosphere. ex. animals, fungi (decomposers) 10.1 Photosynthesis Overview For most plants, leaves are the major site of photosynthesis. The color of a leaf comes from chlorophyll, the green pigment in the chloroplasts which absorbs light energy. Chloroplasts are found mainly in mesophyll => cells forming the interior tissues of the leaf O2 exits and CO2 enters the leaf through microscopic pores called stomata. Veins transport water and sugar. Review the structure of a chloroplast Photosynthesis-1
2 Photosynthetic prokaryotes lack chloroplasts. Instead, their photosynthetic membranes arise from infolded regions of the plasma membrane. The equation describing the process of photosynthesis is: 6CO2 + 12H2O + light energy C6H12O6 + 6O2+ 6H2O Equation simplified: 6CO2 + 6H2O + light energy C6H12O6 + 6O2 History: Before the 1930s, it was believed that carbon dioxide was split and then water was added to the carbon: Step 1: CO2 C + O2 Step 2: C + H2O CH2O C. B. van Niel challenged this hypothesis. The bacteria that he was studying, used hydrogen sulfide (H2S), not water. Sulfur was produced as a waste, not oxygen. CO2 + 2H2S [CH2O] + H2O + 2S He applied his idea to plants: CO2 + 2H2O [CH2O] + H2O + O2 Conclusion: water was split (not carbon dioxide). Confirmed by other scientists twenty years later, using 18 O, a heavy isotope, as a tracer. Experiment 1: CO2 + 2H2O [CH2O] + H2O + O2 Experiment 2: CO2 + 2H2O [CH2O] + H2O + O2 Finding: 18 O label appeared in O2 when water was the source. Hydrogen extracted from water is incorporated into sugar, and oxygen is released to the atmosphere. Photosynthesis-2
3 Photosynthesis is a redox reaction (involves transfer of electrons). Oxidation => loss of electron(s) (loss of energy) Reduction => gain of electron(s) (gain of energy) Water is split (and oxidized) and electrons transferred with H + from water to CO2, reducing it to sugar. Two stages of photosynthesis: 1. The light reactions (photo) convert solar energy to chemical energy => occur in thylakoids => results in ATP and NADPH => provides power for #2. 2. The Calvin cycle AKA light-independent reactions (synthesis) uses energy from the light reactions to incorporate CO2 from the atmosphere into organic substance (carbon fixation) => occurs in the stroma => results in sugar The Light Reactions Properties of light: Form of electromagnetic radiation. Travels in rhythmic waves. Wavelength => distance between crests (nm-gamma; km-radio) Part of electromagnetic spectrum => entire range of radiation Also behaves like discrete particles => photons => have fixed quantities of energy inversely related to its wavelength. ex. shorter wavelengths pack more energy Photosynthesis-3
4 When light meets matter, it may be reflected, transmitted, or absorbed. pigment => substance that absorbs visible light chlorophyll => absorbs red and blue light, while transmitting and reflecting green light => photosynthetic pigment spectrophotometer => measures pigment s ability to absorb various wavelengths of light. Different wavelengths pass through solution of pigment and measure light transmitted. Sets up an absorption spectrum (light absorption vs wavelength) action spectrum => rate of photosynthesis vs. wavelength Thomas Engelmann s experiment with filamentous algea Photosynthesis-4
5 Different types of pigments in chloroplasts: 1. Chlorophyll a => dominant pigment => absorbs best in red and violet-blue, least in the green => participates directly in the light reaction 2. Chlorophyll b => accessory pigment => funnels the energy from additional wavelengths to chlorophyll a. 3. Carotenoids => accessory pigment and photoprotection from excessive light. When a molecule absorbs a photon, one of that molecule s electrons is elevated to an orbital with more potential energy (The photon absorbed matches exactly the energy difference between the ground state and excited state). Excited electrons are unstable. Generally, they drop to their ground state releasing heat (some emit light as well - fluorescence). In the thylakoid membrane, chlorophyll is organized along with proteins and smaller organic molecules into photosystems => reaction center surrounded by a light-harvesting complex (contains pigments bound to proteins). photon absorbed transferred to multiple pigments picked up by chlorophyll a in reaction center electron boosted to primary electron acceptor (redox reactions begin) Photosynthesis-5
6 Two types of photosystem: 1. Photosystem II (PS II) => absorption peak at 680 nm 2. Photosystem I (PS I) => absorption peak at 700 nm Chlorophyll a the same but different protein association. Two possible routes for electron flow: cyclic and noncyclic. Noncyclic (Linear) Electron Flow (predominant route) 1. Photosystem II absorbs photon of light. Electrons of P680 excited to a higher energy state. 2. Electrons are captured by primary electron acceptor (redox). 3. Some energy and an enzyme splits water (photolysis) 2H + + (1/2)O2 + 2e -. Electrons are given to the oxidized reaction center. O2 released as waste product. 4. Photoexcited electrons pass along an electron transport chain (plastoquinone, cytochrome complex, plastocyanin), harnessing their energy to produce ATP. 5. Meanwhile, light energy has excited electron of PS I s P700 reaction center PS I s primary electron acceptor. PS II electron replaces PS I missing electron. 6. Photoexcited electrons are passed from PS I s primary electron acceptor down a second electron transport chain (ferredoxin). 7. The enzyme NADP + reductase transfers electrons from Fd to NADP +. Two electrons are required for NADP + s reduction to NADPH. Purpose of light dependent reactions: solar power converted to chemical energy in ATP and reducing power in NADPH to drive Calvin Cycle. Photosynthesis-6
7 Animation from text: Short video from Pearson includes both parts: Alternate: Cyclic Electron Flow Excited electrons primary acceptor electron transport chain (Fd) Cytochrome complex P700. This generates ATP but no NADPH and no release of oxygen. Necessary because: Calvin cycle consumes more ATP than NADPH. Chloroplasts and mitochondria generate ATP by chemiosmosis => energy stored in the form of H + gradient across a membrane used to drive cellular work (ATP synthesis). ETC pumps protons into thylakoid space (from stroma) as electrons are passed along. This stores energy as a proton-motive force (H + gradient) across the membrane. H + gradient also contributed by photolysis of water AND removal of H + from stroma by NADP +. ATP synthase molecules use the H + gradient to make ATP as H + diffuses back into stroma. (Note: Chemiosmosis also occurs in mitochondria. We ll cover those details in respiration chapter.) Photosynthesis-7
8 10.3 The Calvin Cycle The Calvin cycle is anabolic, using energy to build sugar. Carbon enters the cycle as CO2 and leaves as sugar. ATP provides energy and NADPH provides the reducing power of electrons. The actual sugar product of the Calvin cycle is not glucose, but a three-carbon sugar, glyceraldehyde-3-phosphate (G3P). Each turn of the Calvin cycle fixes one carbon. One glucose needs six cycles (6CO2). Three phases: 1) Carbon fixation => Enzyme RuBP carboxylase (rubisco) attaches CO2 (3 enter one at a time) to a five-carbon sugar, ribulose bisphosphate (RuBP) to form a six-carbon intermediate that is very unstable. Immediately splits in half to form two molecules of 3-phosphoglycerate. 2) Reduction => each 3-phosphoglycerate receives another phosphate group from ATP to form 1,3-bisphosphoglycerate. A pair of electrons from NADPH reduces each 1,3- bisphosphoglycerate to G3P. These (one) can exit and build carbs or continue to phase 3 (remaining five). 3) Regeneration => five G3P (15C) remain in the cycle to regenerate three RuBP. For the net synthesis of one G3P molecule, the Calvin cycle consumes nine ATP and six NADPH (regenerated by light reactions). Photosynthesis-8
9 10.4 Alternative Mechanisms of Carbon Fixation The stomata are the major route for gas exchange (CO2 in and O2 out), and also for the loss of water (transpiration). On hot, dry days, most plants (C3 plants) close their stomata. This causes problems for photosynthesis. Why??? CO2 levels drop, O2 levels rise. Rubisco can add O2 to RuBP which results in a 3-C and a 2-C fragment. The 2-C leaves the chloroplast, enters peroxisome or mitochondria and released as CO2=> photorespiration => produces NO ATP but consumes it and removes organic material from the cell. Why is it in existence? Evolutionary baggage => early Earth had little to no oxygen, so no biggie. In some cases, plays a protective role: those that are impaired in ability for photorespiration suffer more damage from excess light. Adaptations that minimize photorespiration: C4 plants => first fix CO2 into a four-carbon compound. Mesophyll cells are loosely arranged between the bundle sheath (tightly packed around vein) and the leaf surface. Limited to cyclic electron flow here Phosphoenolpyruvate (PEP) carboxylase (which has no affinity for O2) adds CO2 to phosphoenolpyruvate (PEP) to form oxaloacetate (4-C). These are pumped into bundle-sheath cells in form of malate through plasmodesmata. A CO2 molecule is stripped from this 4-C compound, and the 3-C portion returns to the mesophyll cells (to regenerate PEP). The CO2 molecule enters the Calvin cycle via rubisco. ex. sugarcane and corn => do best in intense sunlight Photosynthesis-9
10 CAM plants => crassulacean acid metabolism => open their stomata during the night and close them during the day. CO2 is fixed into a variety of organic acids in mesophyll cells and stored in vacuoles until day when photosynthesis resumes. (Leaf structure is the same as a C3 plant) ex. succulent plants, cacti, pineapples Importance of photosynthesis: plant supplied with chemical energy fuel for respiration and raw materials for anabolic pathways provide fuel and raw materials for heterotrophs presence of oxygen Photosynthesis-10
Chapter 10. Photosynthesis
Chapter 10 Photosynthesis Overview: The Process That Feeds the Biosphere Photosynthesis is the process that converts solar energy into chemical energy Directly or indirectly, photosynthesis nourishes almost
More informationChapter 10 Photosynthesis
Chapter 10 Photosynthesis Overview: The Process That Feeds the Biosphere Photosynthesis is the process that converts solar energy into chemical energy Photosynthesis occurs in plants, algae, certain other
More informationAP Biology. Chloroplasts: sites of photosynthesis in plants
The summary equation of photosynthesis including the source and fate of the reactants and products. How leaf and chloroplast anatomy relates to photosynthesis. How photosystems convert solar energy to
More informationPhotosynthesis. Chapter 10. Biology Eighth Edition Neil Campbell and Jane Reece. PowerPoint Lecture Presentations for
Chapter 10 Photosynthesis PowerPoint Lecture Presentations for Biology Eighth Edition Neil Campbell and Jane Reece Lectures by Chris Romero, updated by Erin Barley with contributions from Joan Sharp Overview:
More informationPhotosynthesis (Outline)
Photosynthesis (Outline) 1. Overview of photosynthesis 2. Producers, consumers, and decomposers of the ecosystem (source of carbon and energy) 3. Plant structures: organ, tissue, cells, sub-cellular organelle,
More informationThe summary equation of photosynthesis including the source and fate of the reactants and products. How leaf and chloroplast anatomy relates to
1 The summary equation of photosynthesis including the source and fate of the reactants and products. How leaf and chloroplast anatomy relates to photosynthesis. How photosystems convert solar energy to
More informationCH 8: Photosynthesis Overview Photosynthesis is the process that converts solar energy into chemical energy
CH 8: Photosynthesis Overview Photosynthesis is the process that converts solar energy into chemical energy Directly or indirectly, photosynthesis nourishes almost the entire living world Autotrophs sustain
More informationEnergy Conversions. Photosynthesis. Plants. Chloroplasts. Plant Pigments 10/13/2014. Chapter 10 Pg
Energy Conversions Photosynthesis Chapter 10 Pg. 184 205 Life on Earth is solar-powered by autotrophs Autotrophs make their own food and have no need to consume other organisms. They are the ultimate source
More informationChapter 10. Photosynthesis
Chapter 10 Photosynthesis Lecture Outline Overview Life on Earth is solar powered. The chloroplasts of plants use a process called photosynthesis to capture light energy from the sun and convert it to
More informationPhotosynthesis. Chapter 10. Biology Eighth Edition Neil Campbell and Jane Reece. PowerPoint Lecture Presentations for
Chapter 10 Photosynthesis PowerPoint Lecture Presentations for Biology Eighth Edition Neil Campbell and Jane Reece Lectures by Chris Romero, updated by Erin Barley with contributions from Joan Sharp Copyright
More informationPhotosynthesis (Outline)
Photosynthesis (Outline) 1. Overview of photosynthesis 2. Producers, consumers, and decomposers of the ecosystem (source of carbon and energy) (Autotrophs: photo-autotrophs, chemo-autotrophs, electro-autotrophs,
More informationPhotosynthesis. Chapter 10. Biology Eighth Edition Neil Campbell and Jane Reece. PowerPoint Lecture Presentations for
Chapter 10 Photosynthesis PowerPoint Lecture Presentations for Biology Eighth Edition Neil Campbell and Jane Reece Lectures by Chris Romero, updated by Erin Barley with contributions from Joan Sharp Overview:
More informationLecture 9: Photosynthesis
Lecture 9: Photosynthesis I. Characteristics of Light A. Light is composed of particles that travel as waves 1. Comprises a small part of the electromagnetic spectrum B. Radiation varies in wavelength
More informationPhotosynthesis. Chapter 10. PowerPoint Lecture Presentations for Biology Eighth Edition Neil Campbell and Jane Reece
Chapter 10 Photosynthesis PowerPoint Lecture Presentations for Biology Eighth Edition Neil Campbell and Jane Reece Lectures by Chris Romero, updated by Erin Barley with contributions from Joan Sharp Overview:
More informationOverall, photosynthesis is the conversion of the Sun s energy to stored chemical energy. (glucose) The overall reaction for photosynthesis:
A.P. Biology Chapter 10- Photosynthesis Scale: 0 - No understanding of the concept and chemical process of photosynthesis. 1- With help, a partial understanding of the reactants and products of the photosynthesis
More informationPhotosynthesis. Biology Eighth Edition Neil Campbell and Jane Reece. PowerPoint Lecture Presentations for
Chapter 10 Photosynthesis PowerPoint Lecture Presentations for Biology Eighth Edition Neil Campbell and Jane Reece Lectures by Chris Romero, updated by Erin Barley with contributions from Joan Sharp Overview:
More informationPHOTOSYNTHESIS: converts light energy to the chemical energy of food 6CO 2 + 6H 2 O + light energy C 6 H 12 O 6 + 6O 2
Photosynthesis Life on Earth is solar powered Photosynthesis nourishes almost all the living world directly or indirectly All organisms use organic compounds for energy and for carbon skeletons. Organisms
More information8 Photosynthesis CAMPBELL BIOLOGY IN FOCUS. Urry Cain Wasserman Minorsky Jackson Reece
CAMPBELL BIOLOGY IN FOCUS Urry Cain Wasserman Minorsky Jackson Reece 8 Photosynthesis Lecture Presentations by Kathleen Fitzpatrick and Nicole Tunbridge Overview: The Process That Feeds the Biosphere Photosynthesis
More informationCHAPTER 8 PHOTOSYNTHESIS
CHAPTER 8 PHOTOSYNTHESIS Con. 8.1 Photosynthesis process by which plants use light to make food molecules from carbon dioxide and water (chlorophyll) 6CO 2 + 12H 2 O + Light C 6 H 12 O 6 + 6O 2 + 6H 2
More informationLECTURE PRESENTATIONS
LECTURE PRESENTATIONS For CAMPBELL BIOLOGY, NINTH EDITION Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson Chapter 10 Photosynthesis Lectures by Erin
More informationPhotosynthesis in Nature
PHOTOSYNTHESIS Photosynthesis in Nature 1. Plants and other autotrophs are the producers of the biosphere 2. Chloroplasts are the site of photosynthesis in plants Introduction Life on Earth is solar powered.
More informationChapter 10: PHOTOSYNTHESIS
Chapter 10: PHOTOSYNTHESIS 1. Overview of Photosynthesis 2. Light Absorption 3. The Light Reactions 4. The Calvin Cycle 1. Overview of Photosynthesis Chapter Reading pp. 185-190, 206-207 What is Photosynthesis?
More informationPhotosynthesis. Chapter 10. PowerPoint Lectures for Biology, Seventh Edition. Lectures by Chris Romero. Neil Campbell and Jane Reece
Chapter 10 Photosynthesis PowerPoint Lectures for Biology, Seventh Edition Neil Campbell and Jane Reece Lectures by Chris Romero PREVIEW The Process That Feeds the Biosphere Photosynthesis Is the process
More informationChapter 10. Photosynthesis
Chapter 10 Photosynthesis Lecture Outline Overview: The Process That Feeds the Biosphere Life on Earth is solar powered. The chloroplasts of plants use a process called photosynthesis to capture light
More informationChapter 10. Photosynthesis
Chapter 10 Photosynthesis Lecture Outline Overview: The Process That Feeds the Biosphere Life on Earth is solar powered. The chloroplasts of plants use a process called photosynthesis to capture light
More informationWhere does most of our society s energy come from (think of fossil fuels), how does that energy become fixed for human use?
Where does most of our society s energy come from (think of fossil fuels), how does that energy become fixed for human use? The Photosynthesis equation 6 CO 2 + 12 H 2 O + Light energy C 6 H 12 O 6 +
More informationPhotosynthesis is the main route by which that energy enters the biosphere of the Earth.
Chapter 5-Photosynthesis Photosynthesis is the main route by which that energy enters the biosphere of the Earth. To sustain and power life on Earth, the captured energy has to be released and used in
More informationBIOLOGY. Photosynthesis CAMPBELL. Reece Urry Cain Wasserman Minorsky Jackson. Lecture Presentation by Nicole Tunbridge and Kathleen Fitzpatrick
CAMPBELL BIOLOGY TENTH EDITION Reece Urry Cain Wasserman Minorsky Jackson 10 Photosynthesis Lecture Presentation by Nicole Tunbridge and Kathleen Fitzpatrick The Process That Feeds the Biosphere Photosynthesis
More informationPhotosynthesis Lecture 7 Fall Photosynthesis. Photosynthesis. The Chloroplast. Photosynthetic prokaryotes. The Chloroplast
Photosynthesis Lecture 7 Fall 2008 Photosynthesis Photosynthesis The process by which light energy from the sun is converted into chemical energy 1 Photosynthesis Inputs CO 2 Gas exchange occurs through
More informationPhotosynthesis. Nearly all of the usable energy on this planet came, at one time or another, from the sun by the process of photosynthesis
Photosynthesis Nearly all of the usable energy on this planet came, at one time or another, from the sun by the process of photosynthesis Photosynthesis 6CO 2 + 12H 2 O C 6 H 12 O 6 + 6O 2 + 6H 2 O Pigments
More informationPhotosynthesis CAMPBELL BIOLOGY IN FOCUS SECOND EDITION URRY CAIN WASSERMAN MINORSKY REECE
CAMPBELL BIOLOGY IN FOCUS URRY CAIN WASSERMAN MINORSKY REECE 8 Photosynthesis Lecture Presentations by Kathleen Fitzpatrick and Nicole Tunbridge, Simon Fraser University SECOND EDITION The Process That
More informationPhotosynthesis CAMPBELL BIOLOGY IN FOCUS SECOND EDITION URRY CAIN WASSERMAN MINORSKY REECE
CAMPBELL BIOLOGY IN FOCUS URRY CAIN WASSERMAN MINORSKY REECE 8 Photosynthesis Lecture Presentations by Kathleen Fitzpatrick and Nicole Tunbridge, Simon Fraser University SECOND EDITION The Process That
More informationPHOTOSYNTHESIS. Chapter 10
PHOTOSYNTHESIS Chapter 10 Modes of Nutrition Autotrophs self-feeders Capture free energy from physical sources in the environment Photosynthetic organisms = sunlight Chemosynthetic organisms = small inorganic
More informationChapter 10 Photosynthesis
Chapter 10 Photosynthesis Autotrophs and Heterotrophs Autotrophs are organisms that make their own food. They obtain everything they need by using CO 2 and inorganic compounds from the environment. Heterotrophs
More informationPhotosynthesis (Chapter 7 Outline) A. For life based on organic compounds, two questions can be raised:
Photosynthesis (Chapter 7 Outline) Sun, Rain, and Survival A. For life based on organic compounds, two questions can be raised: 1. Where does the carbon come from? 2. Where does the energy come from to
More informationWhere It Starts - Photosynthesis
Where It Starts - Photosynthesis What Is Photosynthesis? The Rainbow Catchers Making ATP and NADPH Making Sugars Alternate Pathways What is Photosynthesis? Energy flow through ecosystems begins when photosynthesizers
More informationChapter 10. Photosynthesis. Concept 10.1 Photosynthesis converts light energy to the chemical energy of food
Chapter 10 Photosynthesis Lecture Outline Overview: The Process That Feeds the Biosphere Life on Earth is solar powered. The chloroplasts of plants use a process called photosynthesis to capture light
More informationChapter 8 PHOTOSYNTHESIS Chapter # Chapter Title PowerPoint Image Slideshow
COLLEGE BIOLOGY PHYSICS Chapter 8 PHOTOSYNTHESIS Chapter # Chapter Title PowerPoint Image Slideshow Figure 8.0 Photosynthesis Figure 8.1 Earth s distribution of photosynthesis as seen via chlorophyll a
More informationPHOTOSYNTHESIS. Chapter 10
PHOTOSYNTHESIS Chapter 10 Modes of Nutrition Autotrophs Capture from physical sources in the environment Photosynthetic organisms = sunlight Chemosynthetic organisms = small inorganic molecules (occurs
More informationMetabolism 2 Photosynthesis
Metabolism 2 Photosynthesis Light energy is trapped in the form of high energy electrons. High energy electrons are used to synthesize ATP and reduce CO 2 to form carbohydrates. Oxygen is produced as a
More informationLECTURE PRESENTATIONS
LECTURE PRESENTATIONS For CAMPBELL BIOLOGY, NINTH EDITION Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson Chapter 10 Photosynthesis Lectures by Erin
More informationPhotosynthesis. 3. We have 2 types of organisms depending on their nutrition:
1 لجان الد فعات/تلخيص علوم حياتية 101 Key concepts 10.1 PHOTOSYNTHESIS CONVERTS LIGHT ENERGY TO THE CHEMICAL ENERGY OF FOOD. 10.2 THE LIGHT REACTIONS CONVERT SOLAR ENERGY TO THE CHEMICAL ENERGY OF ATP
More informationPHOTOSYNTHESIS. Light Reaction Calvin Cycle
PHOTOSYNTHESIS Light Reaction Calvin Cycle Photosynthesis Purpose: use energy from light to convert inorganic compounds into organic fuels that have stored potential energy in their carbon bonds Carbon
More informationpigments AP BIOLOGY PHOTOSYNTHESIS Chapter 10 Light Reactions Visible light is part of electromagnetic spectrum
AP BIOLOGY PHOTOSYNTHESIS Chapter 10 Light Reactions http://vilenski.org/science/safari/cellstructure/chloroplasts.html Sunlight is made up of many different wavelengths of light Your eyes see different
More informationPhotosynthesis 6CO 2 + 6H 2 O C 6 H 12 O 6 + 6O 2
PHOTOSYNTHESIS Photosynthesis An anabolic, endergonic, carbon dioxide (CO 2 ) requiring process that uses light energy (photons) and water (H 2 O) to produce organic macromolecules (glucose). photons SUN
More informationChapter 7. Introduction. Introduction. Photosynthesis: Using Light to Make Food. Plants, algae, and certain prokaryotes
Chapter 7 hotosynthesis: Using to Make Food oweroint Lectures for Campbell Biology: Concepts & Connections, Seventh Edition Reece, Taylor, Simon, and Dickey Lecture by Edward J. Zalisko Introduction lants,
More informationA. Structures of PS. Site of PS in plants: mostly in leaves in chloroplasts. Leaf cross section. Vein. Mesophyll CO 2 O 2. Stomata
PS Lecture Outline I. Introduction A. Structures B. Net Reaction II. Overview of PS A. Rxns in the chloroplast B. pigments III. Closer looks A. LD Rxns B. LI Rxns 1. non-cyclic e- flow 2. cyclic e- flow
More informationBIOLOGY. Photosynthetic Processes CAMPBELL. Reece Urry Cain Wasserman Minorsky Jackson
CAMPBELL BIOLOGY TENTH EDITION Reece Urry Cain Wasserman Minorsky Jackson 11 Photosynthetic Processes Lecture Presentation by Nicole Tunbridge and Kathleen Fitzpatrick The Process That Feeds the Biosphere
More informationBIOLOGY. Photosynthesis CAMPBELL. Reece Urry Cain Wasserman Minorsky Jackson. Lecture Presentation by Nicole Tunbridge and Kathleen Fitzpatrick
CAMPBELL BIOLOGY TENTH EDITION Reece Urry Cain Wasserman Minorsky Jackson 10 Photosynthesis Lecture Presentation by Nicole Tunbridge and Kathleen Fitzpatrick The Process That Feeds the Biosphere Photosynthesis
More informationBIOLOGY. Photosynthesis CAMPBELL. Reece Urry Cain Wasserman Minorsky Jackson. Lecture Presentation by Nicole Tunbridge and Kathleen Fitzpatrick
CAMPBELL BIOLOGY TENTH EDITION Reece Urry Cain Wasserman Minorsky Jackson 10 Photosynthesis Lecture Presentation by Nicole Tunbridge and Kathleen Fitzpatrick The Process That Feeds the Biosphere Photosynthesis
More informationSection A2: The Pathways of Photosynthesis
CHAPTER 10 PHOTOSYNTHESIS Section A2: The Pathways of Photosynthesis 4. The Calvin cycle uses ATP and NADPH to convert CO2 to sugar: a closer look 5. Alternative mechanisms of carbon fixation have evolved
More informationPhotosynthesis. Chapter 10. Biology. Edited by Shawn Lester. Eighth Edition Neil Campbell and Jane Reece. PowerPoint Lecture Presentations for
Chapter 10 Photosynthesis Edited by Shawn Lester PowerPoint Lecture Presentations for Biology Eighth Edition Neil Campbell and Jane Reece Lectures by Chris Romero, updated by Erin Barley with contributions
More informationTHE BASICS OF PHOTOSYNTHESIS
THE BASICS OF PHOTOSYNTHESIS Almost all plants are photosynthetic autotrophs, as are some bacteria and protists Autotrophs generate their own organic matter through photosynthesis Sunlight energy is transformed
More informationJust Like the Guy From Krypton Photosynthesis
Just Like the Guy From Krypton Photosynthesis An Overview of Photosynthesis Most of the energy used by almost all living cells ultimately comes from the sun plants, algae, and some bacteria capture the
More informationBIOLOGY. Photosynthesis. The Process That Feeds the Biosphere. Autotrophs sustain themselves without eating anything derived from other organisms
0 Photosynthesis CAMPBELL BIOLOGY TENTH EDITION Reece Urry Cain Wasserman Minorsky Jackson energy ECOSYSTEM CO H O Photosynthesis in chloroplasts Cellular respiration in mitochondria Organic O powers most
More informationLight form the sun is composed of a range of wavelengths (colors). The visible spectrum to the left illustrates the wavelengths and associated color
Photosynthesis Englemann Experiment In 1883, Thomas Engelmann of Germany used a combination of aerobic bacteria and a filamentous alga to study the effect of various colors of the visible light spectrum
More informationAP Biology Day 22. Monday, October 10, 2016
AP Biology Day 22 Monday, October 10, 2016 Discuss: Do-Now Group Discussion What is the equation for photosynthesis, and why is it a redox reaction? What are the steps of photosynthesis, and where does
More informationSunday, August 25, 2013 PHOTOSYNTHESIS
PHOTOSYNTHESIS PREFACE The sun is the ultimate source of energy. The sun powers nearly all life forms. Photosynthesis converts solar energy into chemical energy. Photoautotrophs use solar energy to synthesize
More informationPhotosynthesis. Chapter 8
Photosynthesis Chapter 8 Photosynthesis Overview Energy for all life on Earth ultimately comes from photosynthesis 6CO 2 + 12H 2 O C 6 H 12 O 6 + 6H 2 O + 6O 2 Oxygenic photosynthesis is carried out by
More informationName AP Biology Photosynthesis Notes Mrs. Laux Photosynthesis: Capturing Energy I. Chloroplasts A. Facts: 1. double membrane 2.
Photosynthesis: Capturing Energy I. Chloroplasts A. Facts: 1. double membrane 2. not part of endomembrane system 3. semi-autonomous organelles, grow and reproduce 4. found in plants, algae, cyanobacteria,
More informationPhotosynthesis Overview. Photosynthesis Overview. Photosynthesis Overview. Photosynthesis
Photosynthesis Photosynthesis Overview Chapter 8 Energy for all life on Earth ultimately comes from photosynthesis. 6CO2 + 12H2O C6H12O6 + 6H2O + 6O2 Oxygenic photosynthesis is carried out by: cyanobacteria,
More informationNOTES: CH 10, part 3 Calvin Cycle (10.3) & Alternative Mechanisms of C-Fixation (10.4)
NOTES: CH 10, part 3 Calvin Cycle (10.3) & Alternative Mechanisms of C-Fixation (10.4) 10.3 - The Calvin cycle uses ATP and NADPH to convert CO 2 to sugar The Calvin cycle, like the citric acid cycle,
More informationPHOTOSYNTHESIS. Botany Department B.N.D. College
PHOTOSYNTHESIS Botany Department B.N.D. College Photosynthesis An anabolic, endergonic, carbon dioxide (CO 2 ) requiring process that uses light energy (photons) and water (H 2 O) to produce organic macromolecules
More informationPhotosynthesis. *Calvin cycle. (c) Unicellular protist. (e) Pruple sulfur bacteria. (d) Cyanobacteria. (b) Multicellular algae
Photosynthesis These organisms use light energy to drive the synthesis of organic molecules from carbon dioxide and (in most cases) water. They feed not only themselves, but the entire living world. (a)
More informationPhotosynthesis Overview
Photosynthesis 1 2 Photosynthesis Overview Energy for all life on Earth ultimately comes from photosynthesis 6CO 2 + 12H 2 O C 6 H 12 O 6 + 6H 2 O + 6O 2 Oxygenic photosynthesis is carried out by Cyanobacteria
More informationChapter 5: Photosynthesis: The Energy of Life pg : Pathways of Photosynthesis pg
UNIT 2: Metabolic Processes Chapter 5: Photosynthesis: The Energy of Life pg. 210-240 5.2: Pathways of Photosynthesis pg. 220-228 Light Dependent Reactions Photosystem II and I are the two light capturing
More information10/2/2011. Outline. The Process That Feeds the Biosphere. Autotrophs. Photosynthetic Organisms
Chapter 10 hotosynthesis Outline 1. hotosynthesis overview. 3. igments 4. -dependent rxn 5. -independent rxn () 6. C3, C4 and CAM The rocess That Feeds the Biosphere hotosynthesis is the process that converts
More informationLecture Series 13 Photosynthesis: Energy from the Sun
Lecture Series 13 Photosynthesis: Energy from the Sun Photosynthesis: Energy from the Sun A. Identifying Photosynthetic Reactants and Products B. The Two Pathways of Photosynthesis: An Overview C. Properties
More informationHarvesting energy: photosynthesis & cellular respiration part 1
Harvesting energy: photosynthesis & cellular respiration part 1 Agenda I. Overview (Big Pictures) of Photosynthesis & Cellular Respiration II. Making Glucose - Photosynthesis III. Making ATP - Cellular
More informationphotosynthesis autotrophic organisms photoautotrophs photoautotrophs chapter 14
autotrophic organisms heterotroph autotrophs produce organic nutrients from and HS. Chemoautotrophs use energy from inorganic molecules. hotoautotrophs use radiant energy to make organic compounds photosynthesis
More information1. Plants and other autotrophs are the producers of the biosphere
1. Plants and other autotrophs are the producers of the biosphere Photosynthesis nourishes almost all of the living world directly or indirectly. All organisms require organic compounds for energy and
More information1. Plants and other autotrophs are the producers of the biosphere
1. Plants and other autotrophs are the producers of the biosphere Photosynthesis nourishes almost all of the living world directly or indirectly. All organisms require organic compounds for energy and
More informationPhotosynthesis 05/03/2012 INTRODUCTION: Summary Reaction for Photosynthesis: CO 2 : H 2 O: chlorophyll:
Photosynthesis INTRODUCTION: metabolic process occurring in green plants, algae, some protists and cyanobacteria Photosynthesis is an PROCESS (building organic molecules which store radiant energy as chemical
More informationOverview - the process that feeds the biosphere. Photosynthesis: transformation of solar energy into chemical energy.
Chapter 7 Capturing Solar Energy: Photosynthesis Overview - the process that feeds the biosphere Photosynthesis: transformation of solar energy into chemical energy. Responsible for O 2 in our atmosphere
More informationPHOTOSYNTHESIS CHAPTER 7. Where It Starts - Photosynthesis
PHOTOSYNTHESIS CHAPTER 7 Where It Starts - Photosynthesis IMPACTS, ISSUES: SUNLIGHT AND SURVIVAL Plants are autotrophs, or self-nourishing organisms The first autotrophs filled Earth s atmosphere with
More informationPhotosynthesis: Using Light to Make Food
Chapter 7 Photosynthesis: Using Light to Make Food Lectures by Chris C. Romero, updated by Edward J. Zalisko PowerPoint Lectures for Campbell Essential Biology, Fourth Edition Eric Simon, Jane Reece, and
More informationPhotosynthesis: Life from Light AP Biology
Photosynthesis: Life from Light Supporting a biosphere On global scale, photosynthesis is the most important process for the continuation of life on Earth u each year photosynthesis synthesizes 160 billion
More informationBIOLOGY 4/19/2015. Photosynthesis. Outline. Autotrophs. The Process That Feeds the Biosphere. Photosynthetic Organisms
10 hotosynthesis CAMBELL BIOLOGY TENTH EDITION Reece Urry Cain Wasserman Minorsky Jackson Outline 1. hotosynthesis overview 2. and pigments 3. -dependent rxn 4. -independent rxn () 5. C3, C4 and CAM Lecture
More information8 Photosynthesis CAMPBELL BIOLOGY IN FOCUS. Urry Cain Wasserman Minorsky Jackson Reece
CAMPBELL BIOLOGY IN FOCUS Urry Cain Wasserman Minorsky Jackson Reece 8 Photosynthesis Lecture Presentations by Kathleen Fitzpatrick and Nicole Tunbridge Objective: You will be able to contrast respiration
More informationMetabolismo Biología de 12º
DEPARTAMENTO DE CIENCIAS NATURALES Metabolismo Biología de 12º Nombre y Apellidos FOTOSÍNTESIS 1) Organisms that can exist with light as an energy source and an inorganic form of carbon and other raw materials
More information1 P a g e h t t p s : / / w w w. c i e n o t e s. c o m / Photosynthesis (chapter 12):
1 P a g e h t t p s : / / w w w. c i e n o t e s. c o m / Photosynthesis (chapter 12): Photosynthesis is the fixation of CO 2 and its subsequent reduction to carbohydrate, using hydrogen from water, taking
More informationOutline - Photosynthesis
Outlin Photosynthesis Photosynthesis 1. An Overview of Photosynthesis & Respiration 2. Autotrophs and producers 3. Electromagnetic Spectrum & light energy 4. Chloroplasts: Structure and Function 5. Photosynthetic
More informationChapter 8 Photosynthesis
Chapter 8 Photosynthesis 8-1 NRG and Living Things n Where does the NRG we use come from. n Directly or indirectly from the sun n Plants get their NRG directly from the sun n How? n Plants use photosynthesis
More informationThe light reactions convert solar energy to the chemical energy of ATP and NADPH
10.2 - The light reactions convert solar energy to the chemical energy of ATP and NADPH Chloroplasts are solar-powered chemical factories The conversion of light energy into chemical energy occurs in the
More informationBIOLOGY. Photosynthesis CAMPBELL. Concept 10.1: Photosynthesis converts light energy to the chemical energy of food. Anabolic pathways endergonic
10 Photosynthesis CAMPBELL BIOLOGY TENTH EDITION Reece Urry Cain Wasserman Minorsky Jackson Lecture Presentation by Nicole Tunbridge and Kathleen Fitzpatrick energy ECOSYSTEM CO 2 H 2 O Organic O 2 powers
More informationPhotosynthesis in Detail. 3/19/2014 Averett
Photosynthesis in Detail 1 In photosynthesis many chemical reactions, enzymes and ions work together in a precise order. Enzymes Biological catalyst Substance that initiates or speeds up the rate of a
More informationChapter 7. Photosynthesis: Using Light to Make Food. Lecture by Richard L. Myers
Chapter 7 Photosynthesis: Using Light to Make Food PowerPoint Lectures for Biology: Concepts & Connections, Sixth Edition Campbell, Reece, Taylor, Simon, and Dickey Lecture by Richard L. Myers Introduction:
More informationPhotosynthesis and Life
7-1 Chapter 7 Photosynthesis and Life During photosynthesis Organisms use the energy of light to build highenergy organic molecules. Plants, algae, and some bacteria can do this. Can make their own food
More informationChapter 6. Capturing Solar Energy: Photosynthesis. Lectures by Gregory Ahearn. University of North Florida. Copyright 2009 Pearson Education, Inc.
Chapter 6 Capturing Solar Energy: Photosynthesis Lectures by Gregory Ahearn University of North Florida Copyright 2009 Pearson Education, Inc. 6.1 What Is Photosynthesis? Life on earth depends on photosynthesis.
More informationPhotosynthesis: Using Light to Make Food
Chapter 7 Photosynthesis: Using Light to Make Food Lectures by Chris C. Romero, updated by Edward J. Zalisko 2010 Pearson Education, Inc. PowerPoint Lectures for Campbell Essential Biology, Fourth Edition
More informationName 7 Photosynthesis: Using Light To Make Food Test Date Study Guide You must know: How photosystems convert solar energy to chemical energy.
Name _ 7 Photosynthesis: Using Light To Make Food Test Date Study Guide You must know: How photosystems convert solar energy to chemical energy. How linear electron flow in the light reactions results
More information(A) Calvin cycle (B) Cyclic electron transfer (C) Non-cyclic electron transfer (D) Photorespiration (E) Cellular respiration
AP Biology - Problem Drill 08: Photosynthesis No. 1 of 10 #01 1. What term does the statement below refer to? In a photosynthesis process, an electron is excited from P700 and delivered to its receptor,
More informationChapter 7. Photosynthesis: Using Light to Make Food. Lectures by Edward J. Zalisko
Chapter 7 Photosynthesis: Using Light to Make Food PowerPoint Lectures for Campbell Essential Biology, Fifth Edition, and Campbell Essential Biology with Physiology, Fourth Edition Eric J. Simon, Jean
More informationAN OVERVIEW OF PHOTOSYNTHESIS
Figure 7.0_ Chapter 7: Big Ideas An Overview of hotosynthesis The Reactions: Converting Solar Energy to Chemical Energy AN OVERVIEW OF HOTOSYNTHESIS The : Reducing CO to Sugar hotosynthesis Reviewed and
More informationChapter 7: Photosynthesis
Chapter 7: Photosynthesis Electromagnetic Spectrum Shortest wavelength Longest wavelength Gamma rays X-rays UV radiation Visible light Infrared radiation Microwaves Radio waves Photons Packets of light
More informationLocated in the thylakoid membranes. Chlorophyll have Mg + in the center. Chlorophyll pigments harvest energy (photons) by absorbing certain
a review Located in the thylakoid membranes. Chlorophyll have Mg + in the center. Chlorophyll pigments harvest energy (photons) by absorbing certain wavelengths (blue-420 nm and red-660 nm are most important).
More information8.1 Photosynthesis and Energy
BIOL 100 Ch. 8 1 8.1 Photosynthesis and Energy Photosynthesis and Energy Photosynthesis Making food from light energy Photoautotrophs Use CO2 and water to make sugars Made life possible as we know it Provides
More informationChapter 6 Where It Starts Photosynthesis
Chapter 6 Where It Starts Photosynthesis 6.1 Biofuels Coal, petroleum, and natural gas are fossil fuels the remains of ancient forests, a limited resource Biofuels such as oils, gases, or alcohols are
More informationPhotosynthesis. I. Photosynthesis overview A. Purpose B. Location. The light vs. the dark reaction Chloroplasts pigments A. Light absorption B.
Photosynthesis I. Photosynthesis overview A. Purpose B. Location II. III. The light vs. the dark reaction Chloroplasts pigments A. Light absorption B. Types IV. Light reactions A. Photosystems B. Photophosphorylation
More informationEndosymbiotic Theory. p
Endosymbiotic Theory p. 427-428 The Endosymbiotic Theory Review: What is a theory? What is the difference between prokaryotic and eukaryotic cells? The endosymbiotic theory is the idea that a long time
More information