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1. Introduction to biochemistry
- Prof. Gerald W. Feigenson
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2. Amino acids and peptides
- Prof. Gerald W. Feigenson
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3. Protein structure principles
- Prof. Gerald W. Feigenson
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4. Observed protein structures
- Prof. Gerald W. Feigenson
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5. Protein folds and IV structure
- Prof. Gerald W. Feigenson
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6. Protein stability and folding
- Prof. Gerald W. Feigenson
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7. Haemoglobin structure and stability
- Prof. Gerald W. Feigenson
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8. Enzyme specificity and catalysis
- Prof. Gerald W. Feigenson
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9. Enzyme kinetics (Michaelis-Menten)
- Prof. Gerald W. Feigenson
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10. Enzyme inhibition; chymotrypsin
- Prof. Gerald W. Feigenson
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11. Enzyme regulation and coenzymes
- Prof. Gerald W. Feigenson
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12. Lipids, biomembranes and membrane proteins
- Prof. Gerald W. Feigenson
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13. Structure and function of carbohydrates
- Prof. Gerald W. Feigenson
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14. Metabolism principles
- Prof. Gerald W. Feigenson
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15. Glycolysis - energy and useful cell chemicals
- Prof. Gerald W. Feigenson
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16. Glycolysis control
- Prof. Gerald W. Feigenson
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17. Metabolism of pyruvate and fat
- Prof. Gerald W. Feigenson
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18. Urea cycle; oxidative phosphorylation 1
- Prof. Gerald W. Feigenson
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19. Urea cycle; oxidative phosphorylation 2
- Prof. Gerald W. Feigenson
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20. Light-driven reactions in photosynthesis
- Prof. Gerald W. Feigenson
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21. Gluconeogenesis and the Calvin cycle
- Prof. Gerald W. Feigenson
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22. Synthesis of lipids and N-containing molecules 1
- Prof. Gerald W. Feigenson
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23. Synthesis of lipids and N-containing molecules 2
- Prof. Gerald W. Feigenson
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24. Hormone mechanisms
- Prof. Gerald W. Feigenson
Printable Handouts
Navigable Slide Index
- Introduction
- Lecture outline
- Photosynthesis
- 4 possible fates of absorbed light
- Role of cholorphyll and other pigments
- The light-dependent events of photosynthesis
- Overview of events in Photosystem II
- Event sequence in PSII
- What happens to that QH2?
- Photosynthesis vs.. e- mitochondrial transport
- Event sequence in PSI
- The light-dependent events of photosynthesis
- Summary of light reactions: ‘Z – Scheme’
- Lecture summary
Topics Covered
- Introduction to photosynthesis
- Fates of absorbed light
- Role of chlorophyll and other pigments
- Events in photosystems II and I
- Photosynthesis vs. electronic mitochondrial transport
- Z-scheme
Links
Series:
Categories:
Talk Citation
Feigenson, G.W. (2022, November 27). Light-driven reactions in photosynthesis [Video file]. In The Biomedical & Life Sciences Collection, Henry Stewart Talks. Retrieved October 5, 2024, from https://doi.org/10.69645/EWAQ8135.Export Citation (RIS)
Publication History
Financial Disclosures
- Gerald Feigenson has no commercial/financial relationships to disclose.
Request access to the Principles of Biochemistry lecture series, an extensive introductory to the field of biochemistry. An HSTalks representative will contact you with more information about this series and getting unrestricted access to it.
A selection of talks on Biochemistry
Transcript
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0:00
Greetings. Welcome to Lecture 19 in our Principles of Biochemistry lecture series.
I'm Jerry Feigenson, a professor in
the Department of Molecular Biology and Genetics at Cornell University in the USA.
In the previous lecture, lecture number 18,
you saw how amino acids break down to form nitrogen free useful fuel molecules.
In mammals, the various fuels that we eat create a gradient of protons and
voltage across the inner mitochondrial membrane
by means of four different protein complexes.
Then, the ATP synthase enzyme uses
these gradients to drive synthesis of ATP from ADP and phosphate.
0:55
In this 19th lecture,
you will learn some of the basics of chloroplast structure relevant to photosynthesis,
and we will see what are
the possible four fates for energy in general after light is absorbed.
We will see the roles of chlorophyll and other photosynthetic pigments,
and we will spend most of the time looking at
events in the photosynthetic reaction centers,
which create a proton gradient across the thylakoid membrane.
Then at the end,
we will summarize how the strong reducing power created by
light absorption can be simply summarized in what's called the Z scheme.