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

2. Molecular Representations

Functional Groups

Organic Chemistry

2. Molecular Representations

Functional Groups

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Multiple Choice

Lichens are composed of a symbiosis of fungi and which of the following?

Algae

Protozoa

Bacteria

Viruses

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Verified step by step guidance

Understand the concept of symbiosis: Symbiosis is a close and long-term biological interaction between two different biological organisms. In the case of lichens, this interaction is mutualistic, meaning both organisms benefit from the relationship.

Identify the components of lichens: Lichens are composed of a symbiotic relationship between fungi and another organism. The fungi provide structure and protection, while the other organism contributes to the nutritional needs of the lichen.

Explore the role of algae in lichens: Algae are photosynthetic organisms that can produce food through photosynthesis. In lichens, algae provide carbohydrates and other nutrients to the fungi, which in turn offer a protective environment for the algae.

Differentiate between algae and other options: Protozoa, bacteria, and viruses do not typically engage in mutualistic symbiosis with fungi to form lichens. Algae are the correct partner in this symbiotic relationship due to their ability to photosynthesize and provide nutrients.

Conclude the identification: Based on the understanding of symbiosis and the role of algae, it is clear that lichens are composed of a symbiosis between fungi and algae.