Photosynthesis is a redox reaction :

Slides:



Advertisements
Similar presentations
Photosynthesis !.
Advertisements

Photosynthesis !.
M. Saadatian Photosynthesis 1. Photosynthesis.
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 chemical.
Reactions of Photosynthesis. Photosynthetic Equation Light.
KEY CONCEPT All cells need chemical energy.
Photosynthesis. 1. An Overview of Photosynthesis & Respiration 2. Autotrophs and producers 3. Electromagnetic Spectrum & light energy 4. Chloroplasts:
Photosynthesis: Using Light to Make Food CHAPTER 7  Basics of Photosynthesis o The Chloroplast o Overall Equation o Overview of Process  Light Reactions:
KEY CONCEPT Photosynthesis requires a series of chemical reactions.
Photosynthesis. Overview All energy on earth comes from the sun. We depend on: –Plants –Algae (underwater plants) –Cyanobacteria (photosynthetic bacteria)
KEY CONCEPT Photosynthesis requires a series of chemical reactions.
Biology 3A. Photosynthesis Uses light energy to convert i__________ molecules to o__________ molecules Occurs in the c____________ of plant cells and.
PHOTOSYNTHESIS Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings The Pathways of Photosynthesis (continued) This presentation downloaded.
CHAPTER 10 PHOTOSYNTHESIS Photosynthesis nourishes almost all of the living world directly or indirectly. _____________ produce their organic molecules.
CHAPTER 7 Photosynthesis: Using Light to Make Food
Copyright Cmassengale
THE SHORT STORY OF PHOTOSYNTHESIS:
Objectives: 4(B) Investigate and explain cellular processes, including homeostasis, energy conversions, transport of molecules, and synthesis of new molecules.
KEY CONCEPT Photosynthesis requires a series of chemical reactions.
Part 1: Photosynthesis Section 4.2 & 4.3
AP Biology Photosynthesis: Life from Light AP Biology How are they connected? glucose + oxygen  carbon + water + energy dioxide C 6 H 12 O 6 6O 2 6CO.
Photosynthesis. What is it? Photo – light Synthesis – to make The process of converting light energy to chemical energy and storing it as sugar.
Process of Photosynthesis (takes place inside the chloroplast) 8-3 pg. 235.
BIOLOGY CONCEPTS & CONNECTIONS Fourth Edition Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Neil A. Campbell Jane B. Reece Lawrence.
4.3 Photosynthesis in Detail KEY CONCEPT Photosynthesis converts light energy is captured and used to build sugars that store chemical energy.
Overview of Photosynthesis
AP Biology Photosynthesis: Life from Light Adapted from Ms. Lisa Miller’s AP Biology Notes.
Autotrophs (producers) produce organic molecules from CO 2 and other inorganic raw materials obtained from the environment. Can be categorized by source.
The production of ATP AND NADPH the light reaction of photosynthesis Figure 7.9 Thylakoid compartment (high H + ) Thylakoid membrane Stroma (low H + )
Photosynthesis (Ch. 8) 1. ATP (for energy!) ATP = adenosine triphosphate ATP is the molecule that DIRECTLY provides energy to do cellular work Chemical.
4.3 Photosynthesis in Detail KEY CONCEPT Photosynthesis requires a series of chemical reactions.
The Two Stages of Photosynthesis Science
Objective 21: TSWBAT summarize the carbon-fixing reactions of the Calvin cycle.
Photosynthesis. Chemical Cycling between Photosynthesis and Cellular Respiration –The ingredients for photosynthesis are carbon dioxide and water. CO.
ADP, ATP and Photosynthesis Copyright Cmassengale.
Photosynthesis. Trapping Energy from Sunlight Photosynthesis – is the process plants use to trap the sun’s energy and build carbohydrates, called.
Photosynthesis AP Biology Notes.
Photosynthesis Part 2 The Calvin Cycle.
1. Plants and other autotrophs are the producers of the biosphere
KEY CONCEPT Photosynthesis requires a series of chemical reactions.
8 Photosynthesis 1.
Photosynthesis Light + 6CO2 + 6H2O  C6H12O6 + 6O2
Photosynthesis October 2014.
Remember! In order to carry out cellular processes, cells need ENERGY.
KEY CONCEPT Photosynthesis requires a series of chemical reactions.
KEY CONCEPT Photosynthesis requires a series of chemical reactions.
8-3 The Reactions of Photosynthesis
Cyclic Electron Flow Cyclic electron flow uses only photosystem I and produces ATP, but not NADPH Cyclic electron flow generates surplus ATP, satisfying.
Photosynthesis.
The Reactions of… Photosynthesis.
KEY CONCEPT Photosynthesis requires a series of chemical reactions.
KEY CONCEPT Photosynthesis requires a series of chemical reactions.
Photosynthesis Stores Energy in Organic Compounds
KEY CONCEPT Photosynthesis requires a series of chemical reactions.
KEY CONCEPT Photosynthesis requires a series of chemical reactions.
PHOTOSYNTHESIS: Converting solar energy into chemical energy (SUGARS).
Photosynthesis in detail
8-3 The Reactions of Photosynthesis
Photosynthesis If you were an alien and could only learn one thing about life on earth this would be it.
Photosynthesis Basics Where on the plant?
6. Photosynthesis is the biosphere’s metabolic foundation: a review
CHAPTER 10 PHOTOSYNTHESIS
C. Photosynthesis occurs in two main stages
KEY CONCEPT Photosynthesis requires a series of chemical reactions.
KEY CONCEPT Photosynthesis requires a series of chemical reactions.
Photosynthesis.
KEY CONCEPT Photosynthesis requires a series of chemical reactions.
Converting Light Energy into Chemical Energy
Two Stages of Photosynthesis:
KEY CONCEPT Photosynthesis requires a series of chemical reactions.
Presentation transcript:

Photosynthesis is a redox reaction : 6CO2 + 6H2O + light energy -> C6H12O6 + 6O2 O2 given off by plants comes from H2O Water is split and electrons transferred with H+ from water to CO2, reducing it to sugar.

Photosynthesis is two processes, light reaction solar energy to chemical energy. Calvin cycle incorporates CO2 into an organic molecule and uses energy from the light reaction

In the light reaction light energy absorbed by chlorophyll drives the transfer of electrons and hydrogen from water to NADP+ (nicotinamide adenine dinucleotide phosphate), forming NADPH. NADPH, an electron acceptor, provides energized electrons, reducing power, to the Calvin cycle. The light reaction also generates ATP

Fig. 10.4 Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings

The Calvin cycle CO2 into an organic molecule carbon fixation. carbon is reduced with electrons provided by NADPH. ATP from the light reaction also powers parts of the Calvin cycle. light reactions occur at the thylakoids Calvin cycle occurs in the stroma. Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings

The light reactions convert solar energy to the chemical energy of ATP and NADPH The thylakoids convert light energy into the chemical energy of ATP and NADPH. Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings

A photosystem acts like a light-gathering “antenna complex”. In the thylakoid membrane, chlorophyll is organized along with proteins and smaller organic molecules into photosystems. A photosystem acts like a light-gathering “antenna complex”. Fig. 10.11 Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings

Fig. 10.12 Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings

Fig. 10.14 Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings

Fig. 10.16 Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings

The Calvin cycle uses ATP and NADPH to convert CO2 to sugar CO2 enters the cycle and leaves as sugar. The cycle spends the energy of ATP and the reducing power of electrons carried by NADPH to make the sugar. Each turn of the Calvin cycle fixes one carbon. The actual sugar product of the Calvin cycle is not glucose, but a three-carbon sugar, glyceraldehyde-3- phosphate (G3P). Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings

Fig. 10.17.3 Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings

Photosynthesis is the biosphere’s metabolic foundation: a review In photosynthesis, the energy that enters the chloroplasts as sunlight becomes stored as chemical energy in organic compounds. Fig. 10.20 Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings

Plants also store excess sugar by synthesizing starch. Some is stored as starch in chloroplasts or in storage cells in roots, tubers, seeds, and fruits. Heterotrophs, including humans, may completely or partially consume plants for fuel and raw materials. On a global scale, photosynthesis is the most important process to the welfare of life on Earth. Each year photosynthesis synthesizes 160 billion metric tons of carbohydrate per year. Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings