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

1. A Review of General Chemistry

Intro to Organic Chemistry

Organic Chemistry

1. A Review of General Chemistry

Intro to Organic Chemistry

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Multiple Choice

Why are the genes involved in lactose metabolism considered to be an operon in prokaryotic cells?

They are located on different chromosomes.

They are translated into proteins in the nucleus.

They are regulated by multiple promoters.

They are transcribed together as a single mRNA molecule.

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Verified step by step guidance

Understand the concept of an operon: An operon is a cluster of genes that are transcribed together as a single mRNA molecule. This is a common feature in prokaryotic cells, allowing for coordinated regulation of genes that are involved in similar functions.

Identify the genes involved in lactose metabolism: In prokaryotic cells, the genes responsible for lactose metabolism are part of the lac operon. This includes genes such as lacZ, lacY, and lacA, which encode enzymes necessary for the breakdown and utilization of lactose.

Recognize the transcription process: In an operon, the genes are transcribed together as a single mRNA molecule. This means that when the operon is activated, all the genes within it are transcribed simultaneously, allowing for efficient regulation and expression.

Consider the regulation mechanism: Operons are typically regulated by a single promoter and operator, which control the transcription of all the genes within the operon. This unified regulation is crucial for the coordinated response to environmental changes, such as the presence or absence of lactose.

Conclude why the genes are considered an operon: The genes involved in lactose metabolism are considered an operon because they are transcribed together as a single mRNA molecule, allowing for efficient and coordinated regulation of lactose metabolism in prokaryotic cells.