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

Which of the following best describes the role of photosystems in the light-dependent reactions of photosynthesis?

Photosystems capture light energy to drive the synthesis of ATP and NADPH.

Photosystems store energy in the form of glucose molecules.

Photosystems transport electrons directly to the Calvin cycle.

Photosystems are responsible for the fixation of carbon dioxide into glucose.

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Verified step by step guidance

Understand that photosystems are protein complexes found in the thylakoid membranes of chloroplasts, playing a crucial role in the light-dependent reactions of photosynthesis.

Recognize that the primary function of photosystems is to capture light energy. This energy is used to excite electrons, which are then transferred through a series of proteins embedded in the thylakoid membrane.

Identify that there are two main types of photosystems: Photosystem I (PSI) and Photosystem II (PSII). Each has a specific role in the electron transport chain, contributing to the generation of ATP and NADPH.

Acknowledge that the excited electrons from PSII are used to generate a proton gradient across the thylakoid membrane, which drives ATP synthesis through chemiosmosis. Meanwhile, electrons from PSI are used to reduce NADP+ to NADPH.

Conclude that the role of photosystems is not to store energy in glucose, transport electrons directly to the Calvin cycle, or fix carbon dioxide, but rather to capture light energy to drive the synthesis of ATP and NADPH, which are then used in the Calvin cycle for glucose production.