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3. Draw a photosystem and label the parts.

3. Draw a photosystem and label the parts.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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3. Draw a photosystem and label the parts. On an educational website, this text serves as an instructional prompt for students studying photosynthesis. They are asked to visually represent a photosystem, which is a vital component in the process of photosynthesis found in the thylakoid membranes of plants, algae, and cyanobacteria. A typical illustration of a photosystem should include: 1. **Antenna Complex**: This is a network of chlorophyll molecules and accessory pigments that harvest light and transfer the energy to the reaction center. 2. **Reaction Center**: This contains a specific chlorophyll molecule known as P680 (in Photosystem II) or P700 (in Photosystem I), where the energy from sunlight is used to drive electron transport. 3. **Primary Electron Acceptor**: This molecule captures the excited electrons from the reaction center chlorophyll. 4. **Plastoquinone (PQ)**: A mobile electron carrier within the thylakoid membrane that transfers electrons from Photosystem II to the cytochrome b6f complex. 5. **Cytochrome b6f Complex**: A part of the electron transport chain that facilitates the transfer of electrons to Photosystem I and aids in proton pumping across the thylakoid membrane. 6. **Plastocyanin (PC)**: Another mobile electron carrier that transfers electrons from the cytochrome b6f complex to Photosystem I. 7. **Photosystem I (PSI)**: Works in conjunction with Photosystem II but has a reaction center chlorophyll that absorbs light most efficiently at 700 nm (P700). 8. **Ferredoxin (Fd)**: An iron-sulfur protein that transfers electrons from Photosystem I to the enzyme Ferredoxin-NADP+ reductase (FNR). 9. **Ferredoxin-NADP+ Reductase (FNR)**: An enzyme that catalyzes the transfer of electrons to NADP+, forming NADPH which is used in the Calvin cycle. By including such a diagram and correctly labeling each part, students enhance their understanding of the role and structure of photosystems in the light-dependent reactions of photosynthesis.
Transcribed Image Text:3. Draw a photosystem and label the parts. On an educational website, this text serves as an instructional prompt for students studying photosynthesis. They are asked to visually represent a photosystem, which is a vital component in the process of photosynthesis found in the thylakoid membranes of plants, algae, and cyanobacteria. A typical illustration of a photosystem should include: 1. **Antenna Complex**: This is a network of chlorophyll molecules and accessory pigments that harvest light and transfer the energy to the reaction center. 2. **Reaction Center**: This contains a specific chlorophyll molecule known as P680 (in Photosystem II) or P700 (in Photosystem I), where the energy from sunlight is used to drive electron transport. 3. **Primary Electron Acceptor**: This molecule captures the excited electrons from the reaction center chlorophyll. 4. **Plastoquinone (PQ)**: A mobile electron carrier within the thylakoid membrane that transfers electrons from Photosystem II to the cytochrome b6f complex. 5. **Cytochrome b6f Complex**: A part of the electron transport chain that facilitates the transfer of electrons to Photosystem I and aids in proton pumping across the thylakoid membrane. 6. **Plastocyanin (PC)**: Another mobile electron carrier that transfers electrons from the cytochrome b6f complex to Photosystem I. 7. **Photosystem I (PSI)**: Works in conjunction with Photosystem II but has a reaction center chlorophyll that absorbs light most efficiently at 700 nm (P700). 8. **Ferredoxin (Fd)**: An iron-sulfur protein that transfers electrons from Photosystem I to the enzyme Ferredoxin-NADP+ reductase (FNR). 9. **Ferredoxin-NADP+ Reductase (FNR)**: An enzyme that catalyzes the transfer of electrons to NADP+, forming NADPH which is used in the Calvin cycle. By including such a diagram and correctly labeling each part, students enhance their understanding of the role and structure of photosystems in the light-dependent reactions of photosynthesis.
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