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

33. The Organic Chemistry of Metabolic Pathways

Anaerobic Respiration

Organic Chemistry

33. The Organic Chemistry of Metabolic Pathways

Anaerobic Respiration

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Multiple Choice

Under what environmental conditions do yeast carry out fermentation?

In the presence of light

In the presence of oxygen

At high temperatures

In the absence of oxygen

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Verified step by step guidance

Understand the process of fermentation: Fermentation is a metabolic process that converts sugar to acids, gases, or alcohol. It occurs in yeast and bacteria, and also in oxygen-starved muscle cells, as in the case of lactic acid fermentation.

Identify the role of oxygen in cellular respiration: In the presence of oxygen, yeast cells typically undergo aerobic respiration, which is more efficient in terms of energy production compared to fermentation.

Recognize the conditions for fermentation: Fermentation occurs in anaerobic conditions, meaning it takes place in the absence of oxygen. This is because yeast cells switch to fermentation when oxygen is not available to continue producing energy.

Consider the environmental factors: While light and temperature can affect the rate of fermentation, the presence or absence of oxygen is the key factor that determines whether yeast will carry out fermentation.

Conclude the conditions for yeast fermentation: Yeast carry out fermentation in the absence of oxygen, as this is when they switch from aerobic respiration to anaerobic fermentation to produce energy.