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 statements is true regarding the role of archaea in methane production?

Methane production by archaea occurs in aerobic environments.

Archaea convert methane into carbon dioxide during methanogenesis.

Archaea produce methane through the process of methanogenesis.

Archaea use oxygen as a terminal electron acceptor in methane production.

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Verified step by step guidance

Understand the role of archaea in methane production: Archaea are a group of microorganisms distinct from bacteria and eukaryotes, known for their ability to survive in extreme environments. Some archaea are methanogens, meaning they produce methane as a metabolic byproduct.

Identify the process of methanogenesis: Methanogenesis is the process by which certain archaea produce methane. This process occurs in anaerobic (oxygen-free) environments, such as wetlands, the digestive tracts of ruminants, and sediments.

Clarify the conditions for methanogenesis: Methanogenesis does not occur in aerobic environments. Instead, it takes place in environments where oxygen is absent, as methanogens are obligate anaerobes.

Examine the chemical reactions involved: During methanogenesis, archaea convert carbon compounds like carbon dioxide and hydrogen into methane. The general reaction can be represented as: CO₂ + 4H₂ → CH₄ + 2H₂O.

Conclude the correct statement: Based on the understanding of methanogenesis, the correct statement is that archaea produce methane through the process of methanogenesis, which occurs in anaerobic environments and does not involve the use of oxygen as a terminal electron acceptor.