Table of contents

1. A Review of General Chemistry5h 5m
2. Molecular Representations1h 14m
3. Acids and Bases2h 46m
4. Alkanes and Cycloalkanes4h 17m
5. Chirality3h 39m
6. Thermodynamics and Kinetics1h 22m
7. Substitution Reactions1h 48m
8. Elimination Reactions2h 30m
9. Alkenes and Alkynes2h 9m
10. Addition Reactions3h 19m
11. Radical Reactions1h 58m
12. Alcohols, Ethers, Epoxides and Thiols2h 42m
13. Alcohols and Carbonyl Compounds2h 17m
14. Synthetic Techniques1h 26m
15. Analytical Techniques:IR, NMR, Mass Spect7h 3m
16. Conjugated Systems6h 13m
17. Ultraviolet Spectroscopy51m
18. Aromaticity2h 34m
19. Reactions of Aromatics: EAS and Beyond5h 1m
20. Phenols55m
21. Aldehydes and Ketones: Nucleophilic Addition4h 56m
22. Carboxylic Acid Derivatives: NAS2h 51m
23. The Chemistry of Thioesters, Phophate Ester and Phosphate Anhydrides1h 10m
24. Enolate Chemistry: Reactions at the Alpha-Carbon1h 53m
25. Condensation Chemistry2h 9m
26. Amines1h 43m
27. Heterocycles2h 0m
28. Carbohydrates5h 53m
29. Amino Acids4h 20m
30. Peptides and Proteins2h 42m
31. Catalysis in Organic Reactions1h 30m
32. Lipids 2h 50m
33. The Organic Chemistry of Metabolic Pathways2h 52m
34. Nucleic Acids1h 32m
35. Transition Metals6h 14m
36. Synthetic Polymers1h 49m

3. Acids and Bases

Organic Chemistry Reactions

Organic Chemistry

3. Acids and Bases

Organic Chemistry Reactions

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Multiple Choice

In the context of organic chemistry reactions, which molecule acts as an electron carrier connecting two photosystems in the light reactions of photosynthesis?

Plastoquinone

FADH2

NADPH

ATP

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Verified step by step guidance

Understand the role of electron carriers in photosynthesis: In the light reactions of photosynthesis, electron carriers are molecules that transport electrons from one molecule to another, facilitating the conversion of light energy into chemical energy.

Identify the two photosystems involved: Photosynthesis involves two main photosystems, Photosystem I (PSI) and Photosystem II (PSII), which work together to capture light energy and generate ATP and NADPH.

Recognize the function of Plastoquinone: Plastoquinone is a lipid-soluble molecule that acts as an electron carrier between Photosystem II and the cytochrome b6f complex, which is part of the electron transport chain in the thylakoid membrane.

Differentiate between the given options: FADH2 and NADPH are electron carriers, but they are not involved in connecting the two photosystems in the light reactions. ATP is an energy carrier, not an electron carrier.

Conclude with the correct electron carrier: Based on the role of Plastoquinone in the electron transport chain, it is the molecule that connects the two photosystems by transferring electrons from Photosystem II to the cytochrome b6f complex, facilitating the continuation of the light reactions.