Describe The Energy Transformation That Occur In Photosynthesis
Biol 1406, Instructor: Alice Zhou
Updated 4/18/12
Chapter 10: Photosynthesis
1. Describe the energy transformation that occurs in photosynthesis.
Solar energy to chemical energy specifically stored in sugar.
SolarChemical energy (sugar)
2. Write the summary equation of photosynthesis.
Solar + 6CO2 +6H2O C6H12O6+6O2 (simple) Complex
3. Photosynthesis produces organic sugar molecules. Where does the carbon come from in making the sugars?
From carbon dioxide
4. Aerobic cellular respiration is catabolic, exergonic and oxygen requiring. What about photosynthesis?
Anabolic, endergonic, O2-releasing
5. What is the difference between autotrophs and heterotrophs?
Autotrophs create their own food by photosynthesis …show more content…
Organization of pigments in photosystems.
a) What is the concept of a photosystem?
b) Photosystems are organized into two subcomponents: * antenna complex:
Lots of pigments (A, B, and carotenoids)
Pigments along with some proteins that organize some pigments about
200 found, scaffold proteins
* reaction center complex
A pair of chlorophyll A are found proteins are organized and shape reactions. PEA are bound here.
* (T/F?) In either complex, membrane proteins are present to anchor and support the functions of pigment and other organic molecules.
11. Light interacts with pigments h. When photons strike the pigment molecules in the chloroplast, what immediately happens?_ Photoexcitation_____. After that, what can happen to the electrons in the photosystem? Describe two outcomes in diagrams.
Electrons fall back to ground state
Electrons transferred to PEA
Electrons fall back to ground state
Electrons transferred to PEA
i. In outcome 1, electrons fall back to ground state. Inductive resonance: energy of the excited electron, but not the electron itself, is transferred to a neighboring pigment molecule, exciting the second pigment molecule. Very little energy is lost in this ENERGY
Updated 4/18/12
Chapter 10: Photosynthesis
1. Describe the energy transformation that occurs in photosynthesis.
Solar energy to chemical energy specifically stored in sugar.
SolarChemical energy (sugar)
2. Write the summary equation of photosynthesis.
Solar + 6CO2 +6H2O C6H12O6+6O2 (simple) Complex
3. Photosynthesis produces organic sugar molecules. Where does the carbon come from in making the sugars?
From carbon dioxide
4. Aerobic cellular respiration is catabolic, exergonic and oxygen requiring. What about photosynthesis?
Anabolic, endergonic, O2-releasing
5. What is the difference between autotrophs and heterotrophs?
Autotrophs create their own food by photosynthesis …show more content…
Organization of pigments in photosystems.
a) What is the concept of a photosystem?
b) Photosystems are organized into two subcomponents: * antenna complex:
Lots of pigments (A, B, and carotenoids)
Pigments along with some proteins that organize some pigments about
200 found, scaffold proteins
* reaction center complex
A pair of chlorophyll A are found proteins are organized and shape reactions. PEA are bound here.
* (T/F?) In either complex, membrane proteins are present to anchor and support the functions of pigment and other organic molecules.
11. Light interacts with pigments h. When photons strike the pigment molecules in the chloroplast, what immediately happens?_ Photoexcitation_____. After that, what can happen to the electrons in the photosystem? Describe two outcomes in diagrams.
Electrons fall back to ground state
Electrons transferred to PEA
Electrons fall back to ground state
Electrons transferred to PEA
i. In outcome 1, electrons fall back to ground state. Inductive resonance: energy of the excited electron, but not the electron itself, is transferred to a neighboring pigment molecule, exciting the second pigment molecule. Very little energy is lost in this ENERGY