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

What is the primary result when light energy excites electrons in Photosystem II during photosynthesis?

ATP is directly synthesized from ADP and inorganic phosphate.

Electrons are transferred to NADP+ to form NADPH.

Carbon dioxide is fixed into glucose molecules.

Water molecules are split to release oxygen, protons, and electrons.

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Verified step by step guidance

Understand the role of Photosystem II in photosynthesis: Photosystem II is a crucial component of the light-dependent reactions in photosynthesis. It is responsible for capturing light energy and using it to drive the splitting of water molecules.

Recognize the process of photolysis: In Photosystem II, light energy excites electrons, which leads to the splitting of water molecules (H₂O) into oxygen (O₂), protons (H⁺), and electrons (e⁻). This process is known as photolysis.

Identify the products of water splitting: The splitting of water molecules results in the release of oxygen gas, which is a byproduct of photosynthesis, and provides protons and electrons necessary for further reactions in the photosynthetic process.

Understand the significance of electron transfer: The electrons released from water splitting are transferred through the electron transport chain, which ultimately contributes to the formation of ATP and NADPH, essential molecules for the Calvin cycle.

Clarify the misconception: While ATP and NADPH are important products of the light-dependent reactions, the primary result of electron excitation in Photosystem II is the splitting of water molecules, not the direct synthesis of ATP or NADPH.